10 Best Thermal Wear For Kids in The UK

Last updated on 24/08/2025
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1
9.8
Exceptional
PowerLayer Skins for Boys Kids Base Layer Thermal Long Sleeve Top & Tights Football Compression Set - Dazzling Blue Top + Dazzling Blue Tights, 12-14 Years
PowerLayer
PowerLayer Skins for Boys Kids Base Layer Thermal Long Sleeve Top & Tights Football Compression Set - Dazzling Blue Top + Dazzling Blue Tights, 12-14 Years
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Why We Love It
  • Stay dry during activities.
  • Endorsed by professional athletes.
  • Full range of movement.
Main Highlights
  • Top and Tights Set – Stay dry. Stay light. Stay powerful. Our technical compression base layer set for kids is made from premium materials, perfect for running, training, football, rugby, and other outdoor sports. Built to enhance performance in every activity.
  • Warmth and Flexibility - Our boys' thermal underwear set offers unmatched warmth and flexibility. The 4-way stretch fabric ensures you stay comfortable and unrestricted during football, cycling, running, hocky or any activity!
  • All-Weather Comfort - Engineered for all-weather comfort, our boys thermal set offers a lightweight thermal fabric that keeps you warm and dry during any sport or game.
  • Stay Cool and Dry – TCA’s moisture-wicking D.R.Y. technology keeps sweat at bay, so you stay dry and comfortable even during your activity. These kids thermals is ideal for high-performance training or everyday activities.
  • Athlete-Approved Excellence – At TCA, we design our sportswear with input from top athletes and coaches, ensuring performance and durability. From daily workouts to everyday wear, our activewear supports you through it all. Push your limits with TCA, built for athletes, made for everyone.
9.8
Exceptional
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2
9.7
Exceptional
BUYKUD Kids' Boys Long Sleeve Base Layer Compression Underwear Athletic Shirt Tights Top & Bottom Set, Black, Label Size: 30
BUYKUD
BUYKUD Kids' Boys Long Sleeve Base Layer Compression Underwear Athletic Shirt Tights Top & Bottom Set, Black, Label Size: 30
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Why We Love It
  • Highly durable and smooth.
  • Optimizes body temperature control.
  • Improves mobility and muscle support.
Main Highlights
  • 92%Polyester,8%spandex
  • Abrasion-resistant, extremely smooth, highly elastic fabric that provides heat regulation, moisture wicking, and promotes sweat evaporation helps to prevent body odor
  • Highly elastic fabric allows enhanced mobility in any direction,perfectly for showing your muscle and good figure
  • Help compressing the core muscle area, quickly achieve the desired athletics effect,protect knee ligaments and promote skeletal muscle growth
  • Great for weight training, football, rugby, skiing, snowboarding Tennis Rowing Cycling Equestrian athletics etc
9.7
Exceptional
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3
9.7
Exceptional
Outland Children's Thermal Set Lightweight Ultra Soft Fleece Interior, Vest and Long Johns (Black, 8-10)
Ultra Dry
Outland Children's Thermal Set Lightweight Ultra Soft Fleece Interior, Vest and Long Johns (Black, 8-10)
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Why We Love It
  • Keeps kids comfortably warm.
  • Adapts with four-way stretch.
  • Machine wash, dries quickly.
Main Highlights
  • Children's Extreme Ultralight Warmest Top and Tights Sets make all favorite cold weather activities more pleasant. Whether snowboarding; skiing; camping or other outdoor sports; traveling and even sleeping Outland Thermal set keeps your kids comfortable.
  • The Thin Lightweight Thermal Clothing maintains body heat at a cool temperature by wicking moisture away from the skin; drying quickly and insulating from the cold.
  • The Basic Boy and Girl Underwear Undershirt and Bottom Leggings have an interior microfiber fleece that is soft and cozy; feels great against your skin and under a layer of clothing
  • We have your size! For babies, toddlers, youth; juniors; teens; boys, and girls from 2-4 to 14-16. Several solid color options, including a tactical camo shirt and our new HEATHER GREY.
  • Does not restrict movement; feels like a second skin with four-way stretch and gives your kids the needed warmth without thick or heavy layers. The suit Kids Underwear long johns can be repeatedly washed without shrinking. Machine wash dries quickly.
9.7
Exceptional
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4
9.5
Superb
Kids Base Layer - Fleece Lined Athletic Thermal Set, Warm Football Skins Long Sleeve Top and Leggings Compression Set, Reflective Line Underwear for Biking, Ski & Running
Giyim
Kids Base Layer - Fleece Lined Athletic Thermal Set, Warm Football Skins Long Sleeve Top and Leggings Compression Set, Reflective Line Underwear for Biking, Ski & Running
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Why We Love It
  • Comfortable, abrasion-resistant fabric.
  • Fleece-lined for extra warmth.
  • Enhanced mobility and flexibility.
Main Highlights
  • COMFORTABLE FABRICS: Base layer kids made of comfortable blend fabric, abrasion resistant and anti itch. The elastane waistband makes it easy to dress and undress for kids. Suitable as a underwear for outdoor activities or as a first layer for daily life
  • FLEECE LINED FOR STAY WARM: The outer layer of the boys base layer is made from an smooth polyester fabric which is supple to the touch. The inner layer is lined with a soft fleece for a cosy fit and extra warmth, ideal for children's delicate skin
  • ENHANCED MOBILITY: 4-way stretch fabric gives flexibility by hugging the body and stretching with any movements, keeping kids warm without compromising range of motion or comfort. Kids thermals Specially designed for activities like soccer and running
  • STYLISH AND FUNCTIONAL DESIGN: Classic crewneck design for convenience and comfort. Flat Seam prevents chaffing and discomfort while wearing. Stylish reflective line helps kids to be seen more easily at night for safer outdoor play
  • MOISTURE WICKING & QUICK DRY: The skins for boys wicks away sweat, dries quickly and isolates the cold. Keep your child dry and comfortable. Boys thermal base layer set includes a long sleeve top and bottom that enough to meet the needs of active children
9.5
Superb
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5
9.5
Superb
Save 19%
Qyibleri Kids Base Layer - Kids Thermals Long Sleeve Top & Tights Skins for Boys Set, Boys Thermal Base Layer Set Suit for 4~13 Age, Base Layer Kids for Football Skins
Qyibleri
Qyibleri Kids Base Layer - Kids Thermals Long Sleeve Top & Tights Skins for Boys Set, Boys Thermal Base Layer Set Suit for 4~13 Age, Base Layer Kids for Football Skins
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Why We Love It
  • Excellent heat retention.
  • Effective moisture wicking.
  • Enhanced mobility and comfort.
Main Highlights
  • HEAT RETENTION: Thermal underwear kids are made from a soft, comfy fabric. These football skins are silky on the outside but lined with soft fleece on the inside, provides a lightweight layer that feels soft under the skin. Use the best quality fabrics, even if washed a lot of times, still very warm in cold weather.
  • MOISTURE WICKING: The lightweight base layer kids maintains body heat at a cool temperature by wicking moisture away from the skin; drying quickly and insulating from the cold. No more sweaty, shivering days — just warm, toasty goodness that wraps you in whole body comfort.
  • FUNCTIONAL REFLECTIVE DESIGN: Football underlayer kids features 2 unique Reflective details in boys leggings to improve your visibility during dawn or dusk. A perfect thermal clothing set for your boys and girls, for skiing , winter hiking, football, rugby or simply lounging or sleeping.
  • 4 WAY STRETCH: Highly elastic fabric allows enhanced mobility in any direction. This skins for boys will fit snugly, but stretch so there's nothing holding them back. Skin Compression Fit Support and wrap athletic muscle groups, reducing the risk of injury and aiding blood circulation.
  • ALL DAY COMFORT: Kid's thermal underwear consist of a long sleeve top and bottoms with elastic waistband. Soft kids thermal underwear rest comfortably against your skin, giving you a firm, comfortable fit. They are fit snug enough that there is no bulkiness showing when worn under clothes. Flat-Lock Seams To Reduce Irritation from Chafing for Greater Comfort During Activities.
9.5
Superb
Save 19%
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6
9.4
Superb
Stolpyzh Kids' Boys Base Layer Set Long Sleeve Thermal Sports Underwear Gym Athletic Shirt Tights Top & Bottom Sets (Long Black, 10-11 Years/size 28)
Stolpyzh
Stolpyzh Kids' Boys Base Layer Set Long Sleeve Thermal Sports Underwear Gym Athletic Shirt Tights Top & Bottom Sets (Long Black, 10-11 Years/size 28)
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Why We Love It
  • Skin compression fit support.
  • Quick-drying fabric technology.
  • Perfect for various activities.
Main Highlights
  • 92%Polyester,8%spandex
  • Four-way Stretch Fabric: Skin Compression Fit Support and wrap athletic muscle groups, reducing the risk of injury and aiding blood circulation
  • Quick Dry & Moisture-Wicking: quick-drying, moisture-wicking fabrics,the bottom layer draws moisture away from the skin after sweating, dries quickly, and isolates the cold. Keeping the skin dry will give your child a better wearing experience.
  • Perfect for Many Occasion: Boys underwear set great for weight training, running, football or basketball sports. As well as winter pajamas and base shirts.
  • Comfortable: This boy's thermal underwear set is ultra soft, comfy, with a seamless inner layer, perfect for children's delicate skin. Suitable as a first layer for daily life like comfortable pajamas on nights, or as thermal underwear for outdoor activities in cold weather.
9.4
Superb
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7
9.4
Superb
Kids Thermal Base Layer Set 2-Piece Clothing Set Long Sleeves and Trousers Leggings Thermals White 2-3 Years
Zando
Kids Thermal Base Layer Set 2-Piece Clothing Set Long Sleeves and Trousers Leggings Thermals White 2-3 Years
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Why We Love It
  • Soft and gentle on skin.
  • Versatile for all seasons.
  • Multiple colors for every child.
Main Highlights
  • MATERIAL DESCRIPTION: This children's thermal underwear is made of 62% acrylic, 28% viscose, 10% spandex composition, wear-resistant, no pilling, no fading, no deformation, no adverse effects on your child's delicate skin, well-made.
  • UNIQUE DESIGN: The top of this kids suit is a round neck pullover design, and the trousers are just to ankle length, guaranteeing your child's warmth in spring and autumn seasons, and can also be worn as an inner layer in winter.
  • COLOUR MATCHING CHOICE: This children's thermal underwear has five colour matching options: black, white, navy, light grey, light pink, classic four neutral colours to meet the needs of most children, light pink is very sweet and cute.
  • SIZE CHOICE: This children's thermal underwear has three sizes to choose from: 90 (for 2-3 year olds), 100 (for 3-4 year olds), 110 (for 4-5 year olds), 120 (for 5-6 year olds), please choose the most suitable size for your child according to his/her age and the size chart.
  • WEARING OCCASION: This kids' thermal underwear is perfect for student wear, casual wear, sportswear, loungewear or outdoor wear in winter, spring, autumn, etc. It is one of the must-have items for your child's daily wear.
9.4
Superb
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8
9.3
Superb
Dtone Kids Athletic Base Layer Set Boys Thermal Long Sleeve Top and Leggings for Football Sport Ski Black 8-9 Years
Dtone
Dtone Kids Athletic Base Layer Set Boys Thermal Long Sleeve Top and Leggings for Football Sport Ski Black 8-9 Years
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Why We Love It
  • Exceptional comfort for active kids.
  • Moisture-wicking keeps kids dry.
  • Durable quality for lasting wear.
Main Highlights
  • Exceptional Comfort for Little Explorers: Our kids base layer is crafted with ultra-soft fabric, ensuring a gentle touch against your child's skin for all-day comfort. The boys thermal base layer set offer a snug yet flexible fit, allowing for unrestricted movement. Whether under sports gear or winter attire, this base layer ensures your child can run, jump, and play without any hindrance. It's the perfect choice for active kids who need comfort and freedom to explore.
  • Superior Moisture Management for Active Days: Equipped with advanced moisture-wicking technology, our kids football skins efficiently absorb and rapidly dry sweat. This keeps your child dry and comfortable during rigorous activities like hockey, football, or running in cold weather. The fabric also helps eliminate odors, ensuring freshness and hygiene throughout the day. Your child can stay active and odor-free, making these long johns an ideal choice for any cold-weather activity.
  • Unsurpassed Warmth for Chilly Adventures: The stretchy brushed interior of our boys football underlayer provides exceptional warmth, perfect for cold winter nights as ultra-soft pajamas or for outdoor adventures in chilly conditions. It offers outstanding heat retention, ensuring your child stays comfortably warm without overheating, whether indoors or during moderate outdoor temperatures. This base layer is a cozy shield against the cold, keeping your child warm and comfortable.
  • Durable Quality for Long-Lasting Use: Made from high-quality materials, our boys thermal base layer are built to last. They withstand frequent washing without losing shape, color, or functionality. Parents consistently report that these sets remain in excellent condition after numerous washes, offering great value for money. Your investment in comfort and warmth will last through many seasons, making these sets a reliable choice for your child's wardrobe.
  • Versatile Functionality for Every Occasion: Our kids thermal base layer is incredibly versatile. It can be worn as long johns kids for added warmth during winter sports like ice hockey, football, and skiing, providing essential insulation. It also serves as comfortable pajamas for cold nights or casual wear at home, making it a practical choice for toddlers and older children alike.
9.3
Superb
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9
9.2
Superb
Keanu Heatforce Kids Thermal Vests - Pack of 5 - Winter Warm 0.45 TOG Brushed Underwear - Ages 3-15 Years (5 Pack White Vests - 12-13 Years)
Keanu
Keanu Heatforce Kids Thermal Vests - Pack of 5 - Winter Warm 0.45 TOG Brushed Underwear - Ages 3-15 Years (5 Pack White Vests - 12-13 Years)
Why We Love It
  • Optimal thermal comfort and style.
  • Sustainably crafted with durability.
  • Exceptional value for money.
Main Highlights
  • HEATFORCE KIDS THERMALWEAR BY KEANU: HeatForce Kids Thermal Vests offer more than just your average warmth, with their soft brushed inner and ribbed fabric. They effortlessly combine style and functionality, designed to keep your kids warm during chilly days and nights, these vests also feature seamless sides for extra comfort. These vests reflect Keanu's commitment to fashion and comfort. Enhance your child's winter wardrobe with these practical and stylish essentials.
  • 0.45 TOG RATED BRUSHED BASELAYERS: Lightweight tops made with thermal technology and cotton blend, brushed inner fabric that optimizes heat retention by trapping a cosy layer of warmth close to your skin. our base layers with a 0.45 Tog Rating are designed to provide the perfect level of thermal comfort. The lightweight yet insulating nature of this rating ensures that you can stay cosy without feeling weighed down, making it an excellent choice for versatile and all-day wear.
  • ECO FRIENDLY KIDS THERMALWEAR: Elevate your wardrobe with our thermal underwear, crafted with sustainability in mind. These vests are composed of a blend of 50% Cotton, 50% polyester, ensuring both comfort and durability. We use reactive dyes that are not only vibrant and long-lasting but also completely free from harmful Azo compounds. This distinguishes our eco-friendly tops from cheaper alternatives, making them a responsible and stylish choice for your clothing collection
  • SHOP THE KEANU COLLECTION: Keanu offers a range of matching mini me outfits/nightwear for parents and kids, from mother and daughter and father and son, to the whole family. Complete the look with our other products, Coordinating slippers and accessories available.
  • KIDS PACK OF 5 UK SIZES: Our thermal collection, now available in practical packs of 5, ensures that your little ones are well-prepared for the winter season. With various UK sizes, including 3-4, 5-6, 7-8, 9-10, 12-13, and 14-15 years, these thermals offer exceptional value for your money. As a 5-pack, they'll last all winter, making them perfect for wearing under school uniforms and keeping your children warm during school hours and beyond.
9.2
Superb
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10
9.1
Superb
Kelvindra Base Layer Kids - Fleece Lined Skins for Boys Athletic, Warm Football Skins Suit for 4~13 Age, Long Sleeve Top & Bottom Kids Thermal Base Layer Set for Ski Running and Daily Life Black
Kelvindra
Kelvindra Base Layer Kids - Fleece Lined Skins for Boys Athletic, Warm Football Skins Suit for 4~13 Age, Long Sleeve Top & Bottom Kids Thermal Base Layer Set for Ski Running and Daily Life Black
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Why We Love It
  • Cozy and soft blended material.
  • Extra fleece lining for warmth.
  • Flexible fabric for unrestricted movement.
Main Highlights
  • 【Comfortable & Soft Material】Made from a cozy and soft blended material, this kids base layer is anti-odor & anti itch. Ideal as underwear for school activities or the first layer in daily wear. Even after multiple machine washes, kids skins remain warm in cold weather
  • 【Extra Fleece Lined】The Boys thermal base layer features a windproof and smooth outer layer. The inner layer is lined with cozy fleece for extra warmth. Perfect for children's delicate skin, boys football skins keeps kids warm in winter sports & outdoor play
  • 【Highly Flexible】4-way stretch fabric hugs the body, stretches with movement for flexibility. Boys thermals keep kids warm during activities, without restricting motion or comfort. Skin compression fit supports and wraps muscles groups, reducing the risk of injury
  • 【Moisture Wicking & Quick Dry】The thermals for kids can effectively wick moisture away from the skin, dry quickly and isolates the cold. Breathable fabric provides heat regulation. Keeps your little athlete cool all day. Specially designed for sports like training, cycling and basketball
  • 【Fashionable & Functional Design】Kids thermals comes with long-sleeve top and bottom. Classic Crew neck design for convenience and comfort. High elastic waistband prevents slipping, making dressing and undressing easier. Flat seams reduce friction, enhance comfort during movement
9.1
Superb
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