10 Best thermal underwear (2025)

10 Best thermal underwear (2025) options provide exceptional warmth and comfort for cold weather activities. These top-rated selections feature advanced moisture-wicking fabrics and innovative insulation technologies, ensuring you stay dry and cozy. Brands like Smartwool, Under Armour, and Patagonia lead the pack with their high-performance designs, catering to various outdoor enthusiasts. Whether you're skiing, hiking, or simply lounging at home, these thermal underwear choices offer a perfect blend of style and functionality. With options for both men and women, investing in quality thermal layers will keep you warm and comfortable throughout the chilly months ahead.

SaleBestseller No. 1

Thermajane Long Johns Thermal Underwear for Women Fleece Lined Base Layer Pajama Set Cold Weather (Large, Black)

Heat Retention: Thermajane womens thermal underwear keeps your body heat from escaping. They provide extra warmth and coziness to make a perfect everyday baselayer.
Ultra Soft: Our thermals for women are lined with fleece for extra softness against your skin. They’ll protect you from the cold for added comfort.
Moisture Wicking: While at home or at work, our womens long johns will keep you dry and odor free. No matter the activity, you’ll stay confident all day.
4 Way Stretch: The soft and stretchable fabric on these womens long underwear fit snugly against your skin and will keep you moving freely no matter what your activity is.
Layer Up: When it comes to style and comfort, our womens thermals is the ideal base layer to wear throughout your day.

Bestseller No. 2

Fruit of The Loom Men's Recycled Premium Waffle Thermal Underwear Long Johns Bottom (1, 2, 3, and 4 Packs), Black, Medium

Traditional full length thermal pant made from U.S. sourced cotton and recycled polyester
Soft mini waffle fabric long johns underwear bottoms
Provides insulation and warmth in cold to moderately cold conditions
Moisture wicking and quick drying fabric
Reinforced flat seam construction

SaleBestseller No. 3

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (2X-Large, Black)

Heat Retention: When it comes to warmth and everyday wear, these long johns for men is designed specifically for you to stay protected from the cold.
Ultra Soft Fleece: Designed with a fleece lining & quality material, these ultra soft mens thermal underwear set will keep you feeling comfortable throughout the day.
Moisture Wicking: Stay dry with these long underwear mens as they're made from breathable fabric that effectively wicks away moisture and perspiration.
4 Way Stretch: Made with stretchable material, these thermals for men allows you freedom of movement with no chafing or bunching up when you move.
Layer Up: Layering is essential to ward off the cold, so bundle up with a pair of mens thermals this winter and stay comfortable while outside or in bed as a pajama.

Bestseller No. 4

Fruit of The Loom Men's Recycled Waffle Thermal Underwear Set (Top and Bottom), Greystone Heather, Medium

Classic thermal long sleeve crew neck top and bottom
Made from U.S. sourced cotton and recycled polyester
Medium Weight
Ideal for moderately cool to cold conditions
Easy Care

Bestseller No. 5

PISIQI Thermal Underwear Women Ultra-Soft Long Johns Set Base Layer Skiing Winter Warm Top & Bottom Black

MATERIALl: Thermal underwear set is made of ultra-soft polyester that feels cozily soft, is completely non-irritating, and keeps you comfortably warm to beat the cold weather.
BREATHABILITY: Breathable fabric is perfect to keep sweat away. At the same time, the lightweight thermal clothing maintains your body heat at a cool temperature by wicking moisture away from your skin.
STRETCHABLE: Four-way stretch and gives you the needed warmth without thick or heavy layers. The suit can be repeatedly washed without shrinking. Machine wash.
FEATURE: This long underwear to keep you toasty without being too bulky. You can easily slip your daytime clothes or pajamas over the thermal base layer, . Tights or shirt can be used as base layer or worn alone.
APPLICATION: Ladies ultralight warmest top and tights Sets makes your favorite cold weather activities more pleasant. Whether you are hiking, biking, hunting, snowboard, ski and camping or other outdoor.

Bestseller No. 6

CL convallaria Thermal Underwear for Men, Long Johns Winter Hunting Gear Sport Base Layer Top and Bottom Set Midweight Black L

Extreme Warmth and Comfort: Made from 90% polyester and 10% spandex super soft fabric, they also help reduce pilling and shrinkage. Adding some extra cozy, warm fleece to the mix, our long johns amazingly help to tackle extreme cold weather conditions
Strong Moisture Wicking: The unique breathable, moisture-wicking fibers on our thermal underwear will wick away moisture to keep you dry with no sticky or clammy feeling so you can wear them all day for your work or snow adventure
4-Way Stretch: The design of the Four-way stretch make the reach and squat more comfortable while retaining excellent elasticity and durability for maximum mobility. Use high-quality stitching to beat super-active days and many muddy adventures
Easy Care Base Layer Set: Tagless design in order to obtain greater comfort. The highest dyeing fastness even after multiple washing will not fade and shrink. Fitted with fashion elastic band for added comfort to keep bottoms from falling down
Best Gift Choice: We stock these crew or turtle neck thermals for men in a wide range of sizes. If your family enjoys hunting;camping;snowboarding;skiing;cycling or running then it will be a great choice. A wonderful Gift for mens Christmas Birthday

Bestseller No. 7

WEERTI Thermal Underwear for Men Long Johns with Fleece Lined, Base Layer Men Cold Weather Top Bottom Black

LAYERING IS ESSENTIAL: The perfect cold-weather outfit is all about proper layering, so starting off thermal underwear is a must. Its provide insulation by trapping body heat and wicking away moisture, and disappear under everything from puffer jackets to cashmere sweaters.
ALL-DAY COMFORTABLE WEARING EXPERIENCE: Long johns for men fit snug like a second skin for minimizing heat loss, lightweight but warm, gives you a sense of security throughout the winter.
STRONG MOISTURE WICKING: Thermal long underwear mens is made of moisture wicking and breathable fabric, wick away sweat fast to keep you dry and light, easily keep away from the clammy feeling.
PERFECT DESIGN FOR MAN：Mens long johns perfect for use underneath formal or casual attire, or they can be worn as comfy pajamas on chilly nights. Dress up this set under your clothing to keep warm and cozy in cold climates or bad weather.
FLEXIBILITY FOR ANY MOVEMENT: Men's thermal underwear 4-way stretch delivers full mobility, its strong seams won’t tear prematurely. You’ll feel a sense of freedom in all your activities, they will keep you warm without sacrificing your range of motion or comfort.

Bestseller No. 8

WEERTI Thermal Underwear for Women Long Johns with Fleece Lined, Base Layer Women Cold Weather Top Bottom Black

LAYERING IS ESSENTIAL: The perfect cold-weather outfit is all about proper layering, so starting off thermal underwear is a must. Its provide insulation by trapping body heat and wicking away moisture, and disappear under everything from puffer jackets to cashmere sweaters.
STRONG MOISTURE WICKING: Womens thermal underwear setsmoisture transport system, wick away sweat fast to keep you dry and light. A perfect blend of comfort, warmth, elasticity, and moisture protection.
FLEXIBILITY FOR ANY MOVEMENT: Women's thermal underwear adopts the latest Four-Way stretch, gives you flexibility by hugging your body to move, they will keep you warm without sacrificing your range of motion or comfort.
PERFECT DESIGN FOR WOMEN: Long underwear women combines performance with fashion to give you a more streamlined look. Snug fit ensures no bunching around your waistline or sleeves and reduces heat loss, allows no skin irritation.
ALL-DAY COMFORTABLE WEARING EXPERIENCE: Long johns for women fit snug like a second skin for minimizing heat loss, lightweight but warm. Women thermal set perfect for use underneath formal or casual attire, or they can be worn as comfy pajamas on nights, keep warm and cozy in cold climates.

Bestseller No. 9

Fruit of the Loom Men's Recycled Waffle Thermal Underwear Crew Top, Natural, Medium, Pack of 1

Soft mini waffle fabric thermal long sleeve crew neck t-shirt made from U.S. sourced cotton and recycled polyester
Wicks away moisture to keep you comfortable
Retains heat to keep you warm
Tagless label for added comfort
Includes top only

Bestseller No. 10

Amazon Essentials Thermal Long Johns Underwear Set for Men, Large, Black

SLIM FIT DESIGN: Our set of thermal underwear for men feature a top that fits through the shoulders, chest, and waist, and bottoms that contour through the hip and thigh with a tapered leg opening
BREATHABLE WAFFLE KNIT: Enjoy the comfort of our waffle thermal shirts for men, crafted with a cotton-poly blend for softness and breathability
LIGHTWEIGHT WARMTH: Our men's long johns thermal set, designed to provide warmth throughout the day without the bulk, is the ideal cold weather gear for men
COMFORTABLE DETAILS: Our men's thermal underwear features a top with a classic crew neckline, while the thermal leggings offer an elastic waist and rib cuffs for a snug fit, ensuring all-day comfort
QUALITY YOU CAN TRUST: Rely on Amazon Essentials for affordable men's thermal underwear set that withstands everyday wear

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