Best King Size Mattresses Extra Firm of 2026

Last updated on 04/04/2026

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Silentnight 1400 Eco Comfort Mattress | Firm | King (150 cm x 200 cm )

Silentnight 1400 Eco Comfort Mattress | Firm | King (150 cm x 200 cm )

Silentnight

Why we love it

Eco-friendly breathable materials.
Tailored spinal support.
Hypoallergenic and handmade.

Main Highlights

ECO COMFORT FIBRES : Our EcoComfort Fibre layer is made with sustainable fibres, which are extra breathable, to keep your sleeping environment at a comfortable temperature; Encased in a super-soft, breathable quilted fabric and ideal for planet savers
LONG LASTING SUPPORT: The Mirapocket layer uses 1400 pocket springs which independently respond to movement and weight, delivering unique tailored support and ‘no roll’ together, minimising partner disturbance meaning you can get a more restful night’s sleep with fewer waking periodsMirapocket springs offer zoned support, scientifically proven to improve your spinal alignment and posture
HAND TUFTED SLEEP SURFACE : For additional back support and a naturally firmer feel; It keeps the plush layers and filling in position to prevent it becoming flattened or lumpy; It also firms up the layers, so you keep that soft touch but you have a firmer level of support too
HYPOALLERGENIC: This anti-dust mite and hypoallergenic mattress is allergy-friendly, offering you a clean and fresh night's sleep
FIRM COMFORT : Highly supportive mattress for sleepers with a heavier build, enjoy extra support from head to toe - ideal for front or back sleepers
UK’S MOST TRUSTED SLEEP BRAND: All our products are handmade in the UK and made to order, bringing your beautiful hand-crafted quality products, using the latest innovations; We lead the market in sustainability too and are proud to be a carbon neutral business

9.7

Exceptional

9.7

Exceptional

Silentnight

Silentnight 1400 Eco Comfort Mattress | Firm | King (150 cm x 200 cm )

Why we love it

Eco-friendly breathable materials.
Tailored spinal support.
Hypoallergenic and handmade.

Main Highlights

ECO COMFORT FIBRES : Our EcoComfort Fibre layer is made with sustainable fibres, which are extra breathable, to keep your sleeping environment at a comfortable temperature; Encased in a super-soft, breathable quilted fabric and ideal for planet savers
LONG LASTING SUPPORT: The Mirapocket layer uses 1400 pocket springs which independently respond to movement and weight, delivering unique tailored support and ‘no roll’ together, minimising partner disturbance meaning you can get a more restful night’s sleep with fewer waking periodsMirapocket springs offer zoned support, scientifically proven to improve your spinal alignment and posture
HAND TUFTED SLEEP SURFACE : For additional back support and a naturally firmer feel; It keeps the plush layers and filling in position to prevent it becoming flattened or lumpy; It also firms up the layers, so you keep that soft touch but you have a firmer level of support too
HYPOALLERGENIC: This anti-dust mite and hypoallergenic mattress is allergy-friendly, offering you a clean and fresh night's sleep
FIRM COMFORT : Highly supportive mattress for sleepers with a heavier build, enjoy extra support from head to toe - ideal for front or back sleepers
UK’S MOST TRUSTED SLEEP BRAND: All our products are handmade in the UK and made to order, bringing your beautiful hand-crafted quality products, using the latest innovations; We lead the market in sustainability too and are proud to be a carbon neutral business

Value for Money

Silentnight Miracoil Ortho Mattress, Extra Firm, King

Silentnight Miracoil Ortho Mattress, Extra Firm, King

Silentnight

Why we love it

Eco-friendly for comfortable sleep.
Provides long-lasting support.
Hypoallergenic and fresh.

Main Highlights

ECO COMFORT FIBRES : Our EcoComfort Fibre layer is made with sustainable fibres, which are extra breathable, to keep your sleeping environment at a comfortable temperature; Encased in a super-soft, breathable quilted fabric and ideal for planet savers
LONG LASTING SUPPORT: The Miracoil springs are scientifically proven to improve your spinal alignment and posture which will help if you're struggling with niggling aches and pains, providing luxurious comfort and support personal to you; The zoned support system also ensures you and your partner don’t roll together during the night, so you both sleep peacefully
HAND TUFTED SLEEP SURFACE : For additional back support and a naturally firmer feel; It keeps the plush layers and filling in position to prevent it becoming flattened or lumpy; It also firms up the layers, so you keep that soft touch but you have a firmer level of support too
EXTRA FIRM COMFORT : Striking the perfect balance between comfort and orthopaedic support, this mattress helps with aches and pains and is ideal for those seeking relief from a firmer feel mattress; This highly supportive mattress is for sleepers with a heavier build, enjoy extra support from head to toe - ideal for front or back sleepers
HYPOALLERGENIC: This anti-dust mite and hypoallergenic mattress is allergy-friendly, offering you a clean and fresh night's sleep
UK’S MOST TRUSTED SLEEP BRAND: All our products are handmade in the UK and made to order, bringing your beautiful hand-crafted quality products, using the latest innovations; We lead the market in sustainability too and are proud to be a carbon neutral business

Silentnight Miracoil Ortho Mattress, Extra Firm, King

Why we love it

Eco-friendly for comfortable sleep.
Provides long-lasting support.
Hypoallergenic and fresh.

Main Highlights

ECO COMFORT FIBRES : Our EcoComfort Fibre layer is made with sustainable fibres, which are extra breathable, to keep your sleeping environment at a comfortable temperature; Encased in a super-soft, breathable quilted fabric and ideal for planet savers
LONG LASTING SUPPORT: The Miracoil springs are scientifically proven to improve your spinal alignment and posture which will help if you're struggling with niggling aches and pains, providing luxurious comfort and support personal to you; The zoned support system also ensures you and your partner don’t roll together during the night, so you both sleep peacefully
HAND TUFTED SLEEP SURFACE : For additional back support and a naturally firmer feel; It keeps the plush layers and filling in position to prevent it becoming flattened or lumpy; It also firms up the layers, so you keep that soft touch but you have a firmer level of support too
EXTRA FIRM COMFORT : Striking the perfect balance between comfort and orthopaedic support, this mattress helps with aches and pains and is ideal for those seeking relief from a firmer feel mattress; This highly supportive mattress is for sleepers with a heavier build, enjoy extra support from head to toe - ideal for front or back sleepers
HYPOALLERGENIC: This anti-dust mite and hypoallergenic mattress is allergy-friendly, offering you a clean and fresh night's sleep
UK’S MOST TRUSTED SLEEP BRAND: All our products are handmade in the UK and made to order, bringing your beautiful hand-crafted quality products, using the latest innovations; We lead the market in sustainability too and are proud to be a carbon neutral business

MOLPHIT Extra Firm King Size Mattress, 25cm Deep Hybrid Mattress with Foam and Individually Pocket Springs, Memory Foam Mattresses King for Back Pain Relief, Firm Mattresses in a Box, 150x200x25cm

MOLPHIT Extra Firm King Size Mattress, 25cm Deep Hybrid Mattress with Foam and Individually Pocket Springs, Memory Foam Mattresses King for Back Pain Relief, Firm Mattresses in a Box, 150x200x25cm

MOLPHIT

Why we love it

Exceptional lumbar support provided.
Advanced motion isolation technology.
Effortless setup and unpacking.

Main Highlights

【Ultra Kingsize Mattress 】Designed for those needing maximum support, our firm king mattress 150x200x25cm with a high-density foam core and reinforced pocket springs provides an extra firm H4/H5 sleep surface. It is designed to provide lumbar support for back/stomach sleepers and individuals over 90k).
【7-Zone Ergonomic Support】Molphit's innovative king spring mattress features precision-engineered pocket springs that independently conform to your body's contours. Our advanced zoned system delivers targeted cushioning to 7 key areas - from head to legs - dynamically adjusting as you change positions to keep your body perfectly aligned throughout the night.
【Undisturbed Sleep】Molphit's advanced hybrid mattress combines responsive memory foam with individually encased coils that precisely adapt to your body's contours while creating an exceptional motion isolation barrier. The innovative pocket spring system absorbs and contains movement so effectively that you'll remain undisturbed even when your partner changes positions, guaranteeing peaceful, uninterrupted sleep all night.
【Easy Shipping】The MOPHIT 150x200cm single mattress (25cm thickness) arrives expertly compressed in an easy-to-handle box - simply unroll, cut the protective wrap, and watch your memory foam mattress expand to its full luxurious form within 72 hours. Designed for effortless setup that anyone can manage, it delivers instant comfort from night one while fitting perfectly on all standard bed frames.
【Sleep with Confidence】 Every Molphit king mattress comes with our 100-night risk-free trial and decade-long warranty - a testament to our unwavering commitment to quality craftsmanship and your satisfaction. Our sleep experts stand ready 24/7 to ensure your journey to restorative rest is effortless, because we believe you deserve nothing less than life-changing sleep every single night.

MOLPHIT Extra Firm King Size Mattress, 25cm Deep Hybrid Mattress with Foam and Individually Pocket Springs, Memory Foam Mattresses King for Back Pain Relief, Firm Mattresses in a Box, 150x200x25cm

Why we love it

Exceptional lumbar support provided.
Advanced motion isolation technology.
Effortless setup and unpacking.

Main Highlights

【Ultra Kingsize Mattress 】Designed for those needing maximum support, our firm king mattress 150x200x25cm with a high-density foam core and reinforced pocket springs provides an extra firm H4/H5 sleep surface. It is designed to provide lumbar support for back/stomach sleepers and individuals over 90k).
【7-Zone Ergonomic Support】Molphit's innovative king spring mattress features precision-engineered pocket springs that independently conform to your body's contours. Our advanced zoned system delivers targeted cushioning to 7 key areas - from head to legs - dynamically adjusting as you change positions to keep your body perfectly aligned throughout the night.
【Undisturbed Sleep】Molphit's advanced hybrid mattress combines responsive memory foam with individually encased coils that precisely adapt to your body's contours while creating an exceptional motion isolation barrier. The innovative pocket spring system absorbs and contains movement so effectively that you'll remain undisturbed even when your partner changes positions, guaranteeing peaceful, uninterrupted sleep all night.
【Easy Shipping】The MOPHIT 150x200cm single mattress (25cm thickness) arrives expertly compressed in an easy-to-handle box - simply unroll, cut the protective wrap, and watch your memory foam mattress expand to its full luxurious form within 72 hours. Designed for effortless setup that anyone can manage, it delivers instant comfort from night one while fitting perfectly on all standard bed frames.
【Sleep with Confidence】 Every Molphit king mattress comes with our 100-night risk-free trial and decade-long warranty - a testament to our unwavering commitment to quality craftsmanship and your satisfaction. Our sleep experts stand ready 24/7 to ensure your journey to restorative rest is effortless, because we believe you deserve nothing less than life-changing sleep every single night.

Matoresu 25CM Extra Firm King Mattress with Innerspring Hybrid Memory Foam, King Size Mattress for Ultimate Support & Pressure Relief, Firm Mattress in a Box (150x200x25CM)

Matoresu 25CM Extra Firm King Mattress with Innerspring Hybrid Memory Foam, King Size Mattress for Ultimate Support & Pressure Relief, Firm Mattress in a Box (150x200x25CM)

Matoresu

15% OffLimited time deal

Why we love it

Maximum firm support.
Cool and breathable sleep.
Minimizes motion transfer.

Main Highlights

【Ultra Firm Support 】Designed for those needing maximum support, the king hybrid mattress offers an enhanced firm feel (H4/H5 level). It features a high-density foam core and reinforced pocket springs, ensuring better spinal alignment and support, ideal for those needing extra support. Wake up refreshed without aches.
【Cool & Breathable Sleep 】This king mattress stays cool and dry all night with our advanced 3D knitted fabric that wicks away moisture efficiently. The memory foam adapts to the surrounding temperature, while the independent coils enhance air circulation for a cool and refreshing sleep environment. It's an ideal choice for those who tend to sleep hot.
【Motion Isolation】Enjoy peaceful rest without disruptions. Our 8.7-inch pocket spring system absorbs and isolates movement effectively, ensuring you or your partner can move freely throughout the night. The hybrid design with responsive foam layers further minimizes motion transfer for uninterrupted sleep.
【Personalized Comfort】Experience personalized comfort with our precision-engineered 7-zone support system. It adapts dynamically to your body’s weight distribution, offering targeted cushioning and firm support from head to legs. This design relieves pressure points, reducing stress and delivering unmatched comfort.
【Easy Setup】Our firm king mattress is designed for hassle-free transport and setup, effortlessly navigating stairs, door frames, and narrow hallways—simply unbox, unroll, and watch it expand to full size within 48 hours. If you have any questions, Matoresu online service will assist you in solving the problem within 24 hours.

Matoresu 25CM Extra Firm King Mattress with Innerspring Hybrid Memory Foam, King Size Mattress for Ultimate Support & Pressure Relief, Firm Mattress in a Box (150x200x25CM)

15% OffLimited time deal

Why we love it

Maximum firm support.
Cool and breathable sleep.
Minimizes motion transfer.

Main Highlights

【Ultra Firm Support 】Designed for those needing maximum support, the king hybrid mattress offers an enhanced firm feel (H4/H5 level). It features a high-density foam core and reinforced pocket springs, ensuring better spinal alignment and support, ideal for those needing extra support. Wake up refreshed without aches.
【Cool & Breathable Sleep 】This king mattress stays cool and dry all night with our advanced 3D knitted fabric that wicks away moisture efficiently. The memory foam adapts to the surrounding temperature, while the independent coils enhance air circulation for a cool and refreshing sleep environment. It's an ideal choice for those who tend to sleep hot.
【Motion Isolation】Enjoy peaceful rest without disruptions. Our 8.7-inch pocket spring system absorbs and isolates movement effectively, ensuring you or your partner can move freely throughout the night. The hybrid design with responsive foam layers further minimizes motion transfer for uninterrupted sleep.
【Personalized Comfort】Experience personalized comfort with our precision-engineered 7-zone support system. It adapts dynamically to your body’s weight distribution, offering targeted cushioning and firm support from head to legs. This design relieves pressure points, reducing stress and delivering unmatched comfort.
【Easy Setup】Our firm king mattress is designed for hassle-free transport and setup, effortlessly navigating stairs, door frames, and narrow hallways—simply unbox, unroll, and watch it expand to full size within 48 hours. If you have any questions, Matoresu online service will assist you in solving the problem within 24 hours.

King Size Extra Firm Orthopedic Support Mattress 5FT, 12 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x30 cm, Cotswold

King Size Extra Firm Orthopedic Support Mattress 5FT, 12 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x30 cm, Cotswold

naturalex

8% Off

Why we love it

Superb comfort with varied fillings.
Ensures regulated body temperature.
Dual-sided for seasonal suitability.

Main Highlights

🛏️ EXTRA FIRM ORTHOPEDIC SUPPORT: The Cotswold mattress is a luxury, handcrafted memory foam mattress which is designed to maintain spinal alignment whilst supporting your body across 7 zones. The gel filled wave design that supports your head & neck, shoulders, back, waist, buttocks, legs and feet. It combines quality engineered fabrics with multilayers of comfort fillings. Featuring AreaPur HQ, MemoSoft V30, Gel Fresh and AirFresh cooling technology for a more hygienic sleep.
🥇 KING SIZE COMFORT: Indulge in dreamy nights slumber on this king size memory foam mattress. Gel Fresh memory foam and 3D breathable mesh promotes air circulation and regulates mattress temperature. MemoSoft V30 memory foam promotes blood circulation in the body, fully relaxes your muscles and releases body ches. Enjoy a healthy 8 hours of uninterupted deep sleep every day. Suitable for all sleeping positions.
🌱 BODY HUGS: This king size mattress with Area Pur viscoelastic foam balances softness and elasticity, easing pressure from tired muscles thanks to high - density support. It has been proven to improve your overall sleep by 30% and general wellbeing by 40%.
☀️❄️ ADAPTS TO ALL SEASONS: The winter side of the mattress contains thick and insulating AloeTouch double stretch, extra soft fabric which hugs your body to sleep. The summer side features Gel Fresh viscoelastic foam for a therapeutic rest on warm nights.
💖 LOVE IT OR SHOVE IT: This 30cm / 12 INCH high king size mattress has been vacuum-compressed, sealed and neatly rolled in a box for shipping and delivering directly to you. Please wait 72 hours after opening the box to allow the 5ft memory foam mattress to expand fully, which will help improve the durability and comfort of the mattress. All naturalex mattresses come with a 30 night trial and a 5 year warranty.

King Size Extra Firm Orthopedic Support Mattress 5FT, 12 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x30 cm, Cotswold

8% Off

Why we love it

Superb comfort with varied fillings.
Ensures regulated body temperature.
Dual-sided for seasonal suitability.

Main Highlights

🛏️ EXTRA FIRM ORTHOPEDIC SUPPORT: The Cotswold mattress is a luxury, handcrafted memory foam mattress which is designed to maintain spinal alignment whilst supporting your body across 7 zones. The gel filled wave design that supports your head & neck, shoulders, back, waist, buttocks, legs and feet. It combines quality engineered fabrics with multilayers of comfort fillings. Featuring AreaPur HQ, MemoSoft V30, Gel Fresh and AirFresh cooling technology for a more hygienic sleep.
🥇 KING SIZE COMFORT: Indulge in dreamy nights slumber on this king size memory foam mattress. Gel Fresh memory foam and 3D breathable mesh promotes air circulation and regulates mattress temperature. MemoSoft V30 memory foam promotes blood circulation in the body, fully relaxes your muscles and releases body ches. Enjoy a healthy 8 hours of uninterupted deep sleep every day. Suitable for all sleeping positions.
🌱 BODY HUGS: This king size mattress with Area Pur viscoelastic foam balances softness and elasticity, easing pressure from tired muscles thanks to high - density support. It has been proven to improve your overall sleep by 30% and general wellbeing by 40%.
☀️❄️ ADAPTS TO ALL SEASONS: The winter side of the mattress contains thick and insulating AloeTouch double stretch, extra soft fabric which hugs your body to sleep. The summer side features Gel Fresh viscoelastic foam for a therapeutic rest on warm nights.
💖 LOVE IT OR SHOVE IT: This 30cm / 12 INCH high king size mattress has been vacuum-compressed, sealed and neatly rolled in a box for shipping and delivering directly to you. Please wait 72 hours after opening the box to allow the 5ft memory foam mattress to expand fully, which will help improve the durability and comfort of the mattress. All naturalex mattresses come with a 30 night trial and a 5 year warranty.

King Size Extra Firm Orthopedic Support Mattress 5FT, 12.6 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x32 cm, Cotswold

King Size Extra Firm Orthopedic Support Mattress 5FT, 12.6 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x32 cm, Cotswold

naturalex

Why we love it

Exceptional lumbar support provided.
Dual-season comfort for all.
Premium materials ensure restful sleep.

Main Highlights

🛏️ EXTRA FIRM ORTHOPEDIC SUPPORT: The Cotswold mattress is a luxury, handcrafted memory foam mattress which is designed to maintain spinal alignment whilst supporting your body across 7 zones. The gel filled wave design that supports your head & neck, shoulders, back, waist, buttocks, legs and feet. It combines quality engineered fabrics with multilayers of comfort fillings. Featuring AreaPur HQ, MemoSoft V30, Gel Fresh and AirFresh cooling technology for a more hygienic sleep.
🥇 KING SIZE COMFORT: Indulge in dreamy nights slumber on this king size memory foam mattress. Gel Fresh memory foam and 3D breathable mesh promotes air circulation and regulates mattress temperature. MemoSoft V30 memory foam promotes blood circulation in the body, fully relaxes your muscles and releases body ches. Enjoy a healthy 8 hours of uninterupted deep sleep every day. Suitable for all sleeping positions.
🌱 BODY HUGS : This king size mattress with Area Pur viscoelastic foam balances softness and elasticity, easing pressure from tired muscles thanks to high - density support. It has been proven to improve your overall sleep by 30% and general wellbeing by 40%.
☀️❄️ ADAPTS TO ALL SEASONS: The winter side of the mattress contains thick and insulating AloeTouch double stretch, extra soft fabric which hugs your body to sleep. The summer side features Gel Fresh viscoelastic foam for a therapeutic rest on warm nights.
💖 MATTRESS IN A BOX : This 32cm / 12.6 INCH high king size mattress has been vacuum-compressed, sealed and neatly rolled in a box for shipping and delivering directly to you. Please wait 72 hours after opening the box to allow the 5ft memory foam mattress to expand fully, which will help improve the durability and comfort of the mattress. All naturalex mattresses come with a 5 year warranty.

King Size Extra Firm Orthopedic Support Mattress 5FT, 12.6 Inch Cooling Gel Memory Foam with Pressure Relief for Back Pain - OekoTex Certified, Aloe Touch Fabric Soft on Skin 150x200x32 cm, Cotswold

Why we love it

Exceptional lumbar support provided.
Dual-season comfort for all.
Premium materials ensure restful sleep.

Main Highlights

🛏️ EXTRA FIRM ORTHOPEDIC SUPPORT: The Cotswold mattress is a luxury, handcrafted memory foam mattress which is designed to maintain spinal alignment whilst supporting your body across 7 zones. The gel filled wave design that supports your head & neck, shoulders, back, waist, buttocks, legs and feet. It combines quality engineered fabrics with multilayers of comfort fillings. Featuring AreaPur HQ, MemoSoft V30, Gel Fresh and AirFresh cooling technology for a more hygienic sleep.
🥇 KING SIZE COMFORT: Indulge in dreamy nights slumber on this king size memory foam mattress. Gel Fresh memory foam and 3D breathable mesh promotes air circulation and regulates mattress temperature. MemoSoft V30 memory foam promotes blood circulation in the body, fully relaxes your muscles and releases body ches. Enjoy a healthy 8 hours of uninterupted deep sleep every day. Suitable for all sleeping positions.
🌱 BODY HUGS : This king size mattress with Area Pur viscoelastic foam balances softness and elasticity, easing pressure from tired muscles thanks to high - density support. It has been proven to improve your overall sleep by 30% and general wellbeing by 40%.
☀️❄️ ADAPTS TO ALL SEASONS: The winter side of the mattress contains thick and insulating AloeTouch double stretch, extra soft fabric which hugs your body to sleep. The summer side features Gel Fresh viscoelastic foam for a therapeutic rest on warm nights.
💖 MATTRESS IN A BOX : This 32cm / 12.6 INCH high king size mattress has been vacuum-compressed, sealed and neatly rolled in a box for shipping and delivering directly to you. Please wait 72 hours after opening the box to allow the 5ft memory foam mattress to expand fully, which will help improve the durability and comfort of the mattress. All naturalex mattresses come with a 5 year warranty.

dosleeps King Size Mattress 5FT | 10.6" Extra Thick Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support,Medium Firm,Motion Isolation,Edge Support 150x200x27cm

dosleeps King Size Mattress 5FT | 10.6" Extra Thick Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support,Medium Firm,Motion Isolation,Edge Support 150x200x27cm

dosleeps

9% Off

Why we love it

Innovative support system for comfort.
Cooling Tencel surface regulates temperature.
Durable memory foam enhances sleep.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 10.6" Extra Thick Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support,Medium Firm,Motion Isolation,Edge Support 150x200x27cm

9% Off

Why we love it

Innovative support system for comfort.
Cooling Tencel surface regulates temperature.
Durable memory foam enhances sleep.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 10" Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support, Tencel Cover, Motion Isolation,Edge Support,Medium Firm 150x200x25cm

dosleeps King Size Mattress 5FT | 10" Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support, Tencel Cover, Motion Isolation,Edge Support,Medium Firm 150x200x25cm

dosleeps

Why we love it

Innovative 9 Zone Support System.
Cooling Tencel surface technology.
Individually wrapped pocket coils.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 10" Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support, Tencel Cover, Motion Isolation,Edge Support,Medium Firm 150x200x25cm

Why we love it

Innovative 9 Zone Support System.
Cooling Tencel surface technology.
Individually wrapped pocket coils.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 11" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Medium Firm, Motion Isolation, Edge Support 150x200x28cm

dosleeps King Size Mattress 5FT | 11" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Medium Firm, Motion Isolation, Edge Support 150x200x28cm

dosleeps

Why we love it

Exceptional support for restful sleep.
Cooling Tencel surface for comfort.
Individually wrapped coils minimize disturbances.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 11" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Medium Firm, Motion Isolation, Edge Support 150x200x28cm

Why we love it

Exceptional support for restful sleep.
Cooling Tencel surface for comfort.
Individually wrapped coils minimize disturbances.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 10.2" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Breathable, Medium Firm, Motion Isolation, Edge Support 150x200x26cm

dosleeps King Size Mattress 5FT | 10.2" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Breathable, Medium Firm, Motion Isolation, Edge Support 150x200x26cm

dosleeps

Why we love it

Innovative 9 Zone Support System.
Moisture-wicking Tencel surface.
100-night sleep trial offer.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

dosleeps King Size Mattress 5FT | 10.2" Extra Thick Memory Foam, Pocket Sprung & High-Density Foam | 9-Zone Orthopedic Support, Breathable, Medium Firm, Motion Isolation, Edge Support 150x200x26cm

Why we love it

Innovative 9 Zone Support System.
Moisture-wicking Tencel surface.
100-night sleep trial offer.

Main Highlights

★【A GOOD NIGHT SLEEP】With an innovative 9 Zone Support System constructed by individual spring coil pockets. each spring coil is made of tempered stainless steel wire into a bucket shape. Compressed and sealed in a fabric pocket to reduce noise of spring coil collision. It can eliminates pressure points, motion disturbance and lower back pain, this is the best mattress you will find for an incredible night's sleep!
★【Tencel Surface】The smooth fiber surface of TENCEL Lyocell fibers absorbs moisture more efficiently. This supports the body’s natural thermal regulating mechanism, keeping your skin feeling pleasantly cool and dry throughout the day and night. Fabrics can also be engineered to provide warm and dry sensations on the skin.
★【SUPPORTIVE + UNDISTURBED SLEEP】Each Seperate Pocketed Coil is Individually & Independently Wrapped to Provide an Individualized Comfort Support System by Contouring each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
★【EXTRA MEMORY FOAM】In addition to individual pocket spring coil, the memory foam on top of the mattress provide extra comfort feeling by reduce up to 87% of pressure on neck, spine and hip area. The foam can absorb the pressure and reduce the body turn during sleep and give you a good sleep quality.
★【100-NIGHT SLEEP TRIAL】 Experience the mattress during your trial period to ensure it meets your sleep preferences.

We scanned 965 products

We reviewed these offers relevant to the King Size Mattresses Extra Firm within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Silentnight, MOLPHIT, Matoresu, naturalex, dosleeps, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best King Size Mattresses Extra Firm in the market, we considered we took a deep dive into 4826 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Silentnight 1400 Eco Comfort Mattress | Firm | King (150 cm x 200 cm ). We love many things about this product by Silentnight. What sets it apart from the competition is Eco-friendly breathable materials, Tailored spinal support, Hypoallergenic and handmade.
The best value product for most shoppers and where user satisfaction is continuously the highest is Silentnight Miracoil Ortho Mattress, Extra Firm, King by Silentnight based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for King Size Mattresses Extra Firm and the best cost-to-value ratio is Matoresu 25CM Extra Firm King Mattress with Innerspring Hybrid Memory Foam, King Size Mattress for Ultimate Support & Pressure Relief, Firm Mattress in a Box (150x200x25CM)at Matoresu with a 15% discount.
Our list of the best King Size Mattresses Extra Firm is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.