Top 10 Best thermals in 2026

Last Updated - 6/17/2026

🏆Best Choice

TELALEO

TELALEO Boys' Girls' Long Sleeve Compression Shirts Thermal Fleece Lined Kids Athletic Sports Tops Leggings Baselayer Set M

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•85% Polyester / 15% Spandex (elastic fabric), Fleece Lined.
•Feature: TELALEO Boys long sleeve compression shirts use stretchy brushed inner fleece material,thick and thermal, keeps your children warm in cold winter days.
•Heat Retention fabric technology offers dry, comfortable wear.
•Smooth flat seams prevent chafing, while the durability is great.
•Perfect for soccer, baseball, ice hockey, basketball, snowboarding, running and other activities in cold weather days. Size Chart: XSmall=US Size 6-6X / Small=US Size 7-8 / Medium=US Size 10-12 / Large=US Size 14-16 / X-Large=US Size 18-20.

View offer on:

$17.99

$19.99

-10%

Check Price

Rocky

Rocky Thermal Underwear Kids Girls Thermal Underwear Set Long Johns kid Thermals Kid Base Layer kids thermals top bottom set Winter Clothes Shirt Pants Ski/Extreme Cold (Lavender, S)

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•THERMAL UNDERWEAR KIDS: STAY-PUT DESIGN: Oversized jackets? Check. Bulky sweaters? Double check. Cargo pants loaded with all the essentials? Yup, even them. No matter how heavy your outer layers are, our thermals for kids base layers for cold weather/skiing stay put under even the heaviest loads.
•KEEP WARM AND DRY: Ultra soft fleece lined thermals for kids combined with moisture-wicking power can only mean one thing: Your little one is wearing a pair of Rocky youth thermal set underwear. No more sweaty, shivering nights — just warm, toasty goodness that wraps you in whole body comfort.
•ALL-DAY COMFORT: From morning jogs in freezing temps to chilly winter nights, our underoos children thermal underwear set are designed to keep you comfortable and warm all day long. With our fleece base layer kids for cold weather soft fabric that’s lightweight yet warm, it’s the kids underwear girls love.
•EASY TO CLEAN: A few wash cycles, and your long johns are toast. At least, inferior waffle-knit thermal tights are. Not with Rocky winter undies! Our thermal wear for girls are made from durable poly-spandex and superior stitching, washing machines are no match for their tough-as-nails construction.
•THERMALS KIDS LOVE: “Mooooom! They’re SO itchy!” Four words you’ll never hear your little one utter in a pair of Rocky thermal wear for kids warmer thermals girls underwear. With fleecy-soft comfort and a no-ride design, your little one will be nothing but cozy and content.

View offer on:

$26.99

$29.99

-10%

Check Price

Rocky

Rocky Thermal Underwear Kids, Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants, Ski/Extreme Cold (Black, Small)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•THERMAL UNDERWEAR KIDS: STAY-PUT DESIGN: Oversized jackets? Check. Bulky sweaters? Double check. Cargo pants loaded with all the essentials? Yup, even them. No matter how heavy your outer layers are, our thermals for kids base layers for cold weather stay put under even the heaviest loads.
•KEEP WARM AND DRY: Ultra soft fleece lined thermals for kids combined with moisture-wicking power can only mean one thing: Your little one is wearing Rocky fleece lined base layer kids underwear. No more sweaty, shivering nights — just warm, toasty goodness that wraps you in whole body comfort.
•ALL-DAY COMFORT: From morning jogs in freezing temps to chilly winter nights, our underoos are designed to keep you comfortable and warm all day long. With our fleece base layer kids soft fabric that’s lightweight yet warm, it’s the kids underwear boys love.
•EASY TO CLEAN: A few wash cycles, and your long johns are toast. At least, inferior waffle-knit thermal tights are. Not with Rocky winter undies! Our thermal wear for boys are made from durable poly-spandex and superior stitching, washing machines are no match for their tough-as-nails construction.
•THERMALS KIDS LOVE: “Mooooom! They’re SO itchy!” Four words you’ll never hear your little one utter in a pair of Rocky thermal wear for kids boys underwear. With fleecy-soft comfort and a no-ride design, your little one will be nothing but cozy and content with Rocky kids thermal wear.

View offer on:

$26.99

Check Price

Ewedoos

Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Fleece-Lined Soft (Without bulk). Ewedoos thermal underwear for kids gives your kids a high-quality warmth thanks to our unique soft and thick fleece-lined lightweight fibers. Ewedoos long johns for kids keep you warm but not bulky. Bring it on, blizzards. Do your worst, polar vortexes
•Unique Neckline Shirts. Ensuring maximum protection for your kids - the collar has been widened, increasing extra coverage area for your kid's neck. To keep up with them on their adventures, our kids thermals top and bottom set also feature flat and unnoticeable seaming, reducing chafing over long sessions
•Functional Reflective Design. Ewedoos thermal underwear for kids features 2 unique Reflective details to improve your visibility during dawn or dusk. A perfect thermal clothing set for your boys and girls, for skiing on the slopes, winter hiking, hunting, softball game or simply lounging or sleeping
•All-weather Performance (Without sweaty mess). Airflow moves easily through the garment. The 15% spandex makes these boys thermal underwear set ultra-comfortably 4-way stretch, and the 85% polyester adds extra breathability & moisture-wicking to keep you comfortable and dry, so trips to the snow won't be ruined by constant uncomfortable sweating and overheating. Children can keep their love for sports and keep winning
•Gifts That Make Spirits Bright. Warm on the inside to keep your children going outside. Ewedoos kids thermals top and bottom set let children not be afraid of the winter and melt away distractions all year long. Great for Christmas, birthday and New Year gifts

View offer on:

$14.99

$26.99

-44%

Check Price

Rolimaka

Rolimaka 2 Pack Youth Boys' Thermal Underwear Set Fleece Lined Compression Shirt Leggings Sports Tights Pants Big Kids' Base Layer M

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•These boys thermal underwear set include one thermal compression pant and one thermal shirt, they use ultra-soft & smooth fabric for extreme comfort with very little weight. It has a soft fleecy interior that helps hold in heat
•Slim, stretchy design let you move free and easy or layer for warmth, and material wicks sweat & dries really fast
•Extremely simple design -using less seams to reduce irritation from chafing in activities
•Anti-odor technology prevents the growth of odor, keep you stay comfortable and focus
•These boys fleece thermal compression pants as perfect sports base layers. Improve your performance for skiing, snowing, soccer, basketball, hockey, baseball, lacrosse, jiu-jitsu, snowboarding and other sports in cold weather days

View offer on:

$25.99

Check Price

Fruit of the Loom

Fruit of the Loom Premium Boy's Thermal Waffle Set, Heather Greystone, 8

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Long sleeve crew neck t-shirt and pant set with reinforced seam construction
•Soft mini waffle fabric made from U.S. sourced cotton and recycled polyester
•Wicks away moisture, dries fast, and retains heat
•Tagless collar and waistband
•Easy Care

View offer on:

Check Price

Arshiner

Arshiner Thermal Underwear for Kids Long Johns Girls Base Layer Top and Bottom Set Purple 5-6 Years

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Heat Retention: Girls thermal underwear set are made from brushed polyester milk silk fabric. The fine fluff acts like a second skin, effectively reducing heat loss and providing lightweight warmth
•Live in Layers: Long johns for kids is lightweight and comfortable, easily layered under regular clothing to provide warmth without bulk
•Stretch Fabric: Kids thermals top and bottom set uses the latest four-way stretch fabric, which fits the body, giving children enough room to move without feeling restrained
•Perfect Gift: Not just gifts, but also a way to convey warmth. Kids can wear base layer for Christmas, Halloween, skiing, running, traveling, cycling, camping, hunting, and winter sports
•Keep Dry: Girls long underwear is breathable, moisture-wicking and a must-have item for girls in winter

View offer on:

$14.99

Check Price

32 Degrees

Kids Heat Baselayer Set, Black, Small

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•32 Degrees Weatherproof Kids Base Layer Thermal Shirt Long Underwear Set, Black [Small: 6/7]

View offer on:

$14.99

Check Price

Poekuao

Poekuao Thermal Underwear for Kids Thermals Top and Bottom Set Boys Soft Long Johns Fleece Lined Base Layer for Skiing Black

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Practical Design: Thermal underwear for kids with thumb holes on the top for extra warmth, elastic waistband for easy on and off, and a functional fly for convenience
•Stretch & Warmth: Boys thermal underwear set made from 88% polyester and 12% spandex, featuring 4-way stretch outer fabric and fleece-lined interior for lasting warmth
•Soft & Moisture Wicking: Ultra soft breathable fabric wicks moisture to keep kids dry, fresh, and comfortable during indoor or outdoor activities
•Tagless Comfort: Kids long underwear features smooth flatlock seams and a tag free design to prevent chafing, reduce skin irritation, and provide all day comfort
•Multi Use Base Layer: Kids thermals top and bottom set perfect for home wear or as a winter sports base layer for skiing, ice skating, soccer, baseball, hockey, basketball, running, and more

View offer on:

$17.99

Check Price

Fruit of the Loom

Fruit of the Loom girls Premium Thermal Waffle Underwear Base Layer Set, Lavender/Purple, 8-Jul US

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Warm waffle long john thermal set for girls
•Soft mini waffle fabric made from U.S. sourced cotton and recycled polyester
•Long-sleeve crew-neck t-shirt and pant set with reinforced seam construction
•Wicks away moisture, dries fast, and retains heat
•Tagless collar and waistband

View offer on:

$19.99

Check Price

📊

📈 How we rank

With our cutting-edge technology, we examine thousands of products and retailers, assessing reviews, ratings, trends, and sales rankings to identify what matters most to users like you.

Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.