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10 Best Women's Thermal Undergarments 2025 in the United States

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TCA Super

TCA

TCA Super Thermal Long Sleeve Women Running, Ski Base Layer - Compression Shirts Woman, Long Sleeve Workout Tops for Women - Tourmaline, X-Large

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#1

Winner

Cuddl Duds

Cuddl Duds

Cuddl Duds Womens Thermal Underwear - Heavyweight Base Layer 2-Piece Set - Cozy Moisture-Wicking Long Johns - Winter Clothing - Boysenberry Purple - Medium

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Sponsored

TCA Super

TCA

TCA Super Thermal Long Sleeve Women Running, Ski Base Layer - Compression Shirts Woman, Long Sleeve Workout Tops for Women - Tourmaline, X-Large

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#2
HEROBIKER

HEROBIKER

HEROBIKER Women's Thermal Underwear Set, Ultra Soft Thermal Shirt Long Johns Top Bottom Warm with Fleece lined Winter Base Layer Sets M Black

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#3
Fruit of t

Fruit of the Loom

Fruit of the Loom Women's Micro Waffle Premium Thermal Set, Black, 2X

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#4
Thermajane

Thermajane

Editor’s Choice

Thermajane Long Sleeve Thermal Shirts for Women Cold Weather, Womens Thermal Underwear Tops, Base Layer Women Thermal (Black, X-Large)

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#5
Smartwool

Smartwool

Smartwool SW016369010L Women's Merino 250 Baselayer Crew Charcoal Heather L

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#6
Smartwool

Smartwool

Smartwool Women's Classic Thermal Merino Base Layer Bottom, Black, Medium

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#7
MERIWOOL W

MERIWOOL

MERIWOOL Womens Base Layer 100% Merino Wool Midweight Long Sleeve Thermal Shirt Black

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#8
100% Merin

Minus33 Merino Wool

100% Merino Wool Women's Lightweight Crew - Base Layer Long Sleeve Shirt - Charcoal Gray - Small

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#9
DEVOPS Wom

DEVOPS

DEVOPS Women's 2 Pack Thermal Long Johns Underwear Leggings Pants (X-Large, Black/Navy)

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#10
Smartwool

Smartwool

Smartwool SW016373010L Women's Merino 250 Baselayer 1/4 Zip Charcoal Heather L

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How do we rank products for you?

Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

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Our Top Picks

#1

Winner

Cuddl Duds Womens Thermal Underwear - Heavyweight Base Layer 2-Piece Set - Cozy Moisture-Wicking Long Johns - Winter Clothing - Boysenberry Purple - Medium

9.8  score

Cuddl Duds Womens Thermal Underwear - Heavyweight Base Layer 2-Piece Set - Cozy Moisture-Wicking Long Johns - Winter Clothing - Boysenberry Purple - Medium

Cuddl Duds

9.8  score

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Rating
9.8
Chosen by1,392
Material
Weight
Fit

Most important from
2812 reviews

Material
The material feels durable and well-made, making it a great investment for your winter wardrobe.
Weight
The thermals are incredibly soft and comfortable, perfect for chilly days with fleece lining that provides excellent warmth without adding bulk.
Fit
The fit is just right—not too tight, but snug enough to keep the warmth in.

The Cuddl Duds Thermal Underwear for Women is designed to keep you warm during cold weather with its brushed fleece interior and soft exterior. The material, a blend of 93% Polyester and 7% Spandex, offers good stretch and a snug fit, making it comfortable for active wear. The heavyweight fabric ensures warmth without adding bulk, allowing for versatile wear either as a base layer or standalone piece.

The moisture-wicking feature is beneficial for maintaining dryness, while the UV protection adds an extra layer of safety for outdoor activities. The inclusion of thumbholes in the sleeves and a modern rise in the leggings enhance the fit and comfort further. However, some users might find the fit too snug if they prefer a looser wear. The seam construction is designed to reduce chafing, enhancing comfort.

With machine washable care instructions, maintaining this thermal set is straightforward. This product is best suited for those looking for reliable, stylish thermal wear that can be used for both outdoor activities and lounging at home.

Check price

Rating
9.8
Chosen by1,392
Material
Weight
Fit

Most important from
2812 reviews

Material
The material feels durable and well-made, making it a great investment for your winter wardrobe.
Weight
The thermals are incredibly soft and comfortable, perfect for chilly days with fleece lining that provides excellent warmth without adding bulk.
Fit
The fit is just right—not too tight, but snug enough to keep the warmth in.

Buying Guide for the Best Women's Thermal Undergarments

When it comes to choosing women's thermal undergarments, it's important to consider a few key factors to ensure you stay warm and comfortable in cold weather. Thermal undergarments are designed to provide insulation and retain body heat, making them essential for outdoor activities, winter sports, or simply staying cozy during chilly days. Here are some key specifications to look out for when selecting the best thermal undergarments for your needs.
MaterialThe material of thermal undergarments is crucial because it determines how well the garment will insulate and wick moisture away from your skin. Common materials include wool, synthetic fibers, and blends. Wool, especially merino wool, is excellent for warmth and moisture-wicking but can be more expensive. Synthetic fibers like polyester are good for moisture-wicking and are often more affordable. Blends combine the benefits of both. Choose wool if you need maximum warmth and comfort, synthetics for active use and affordability, and blends for a balance of both.
WeightThermal undergarments come in different weights, which indicate the thickness and warmth of the fabric. Lightweight thermals are suitable for mild cold and high-activity levels, as they provide some warmth without causing overheating. Midweight thermals offer more insulation and are versatile for a range of activities and temperatures. Heavyweight thermals provide maximum warmth and are ideal for extremely cold conditions or low-activity levels. Select lightweight for mild conditions or high activity, midweight for moderate cold and versatility, and heavyweight for extreme cold or low activity.
FitThe fit of thermal undergarments affects both comfort and performance. A snug fit is essential for effective insulation and moisture-wicking, as it ensures the fabric stays close to your skin. However, it should not be too tight to restrict movement or cause discomfort. Look for a fit that is close to the body but allows for a full range of motion. If you plan to layer other clothing on top, ensure the thermals are not too bulky. Choose a snug but comfortable fit for optimal performance.
Moisture-WickingMoisture-wicking properties are important to keep you dry and comfortable, especially during physical activities. This feature helps to draw sweat away from your skin and allows it to evaporate quickly. Materials like merino wool and certain synthetic fibers are known for their excellent moisture-wicking abilities. If you plan to engage in activities that cause you to sweat, prioritize thermals with good moisture-wicking properties to stay dry and avoid chills.
Odor ResistanceOdor resistance is a beneficial feature, particularly if you plan to wear your thermal undergarments for extended periods or during intense activities. Some materials, like merino wool, naturally resist odors, while others may have treatments to prevent bacterial growth. This feature helps keep you feeling fresh and reduces the need for frequent washing. If you need thermals for multi-day use or high-intensity activities, look for odor-resistant options.
Seam ConstructionThe construction of seams in thermal undergarments can impact comfort, especially if you wear them for long periods or during active pursuits. Flatlock seams are designed to lie flat against the skin, reducing the risk of chafing and irritation. Regular seams may be more noticeable and can cause discomfort. For maximum comfort, especially during physical activities, opt for thermals with flatlock seams.

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