10 Best Thermal Underwear For Women To Use In Extreme Cold – 2024

Enjoy the chilly winters with the right clothes that keep you warm and toasty.

Reviewed by Carly Morrison, Designer Carly Morrison Carly MorrisonDesigner insta_icon
Written by , MSc Pratima Ati MSc linkedin_icon
Edited by , MA (Journalism & Mass Communication), Certified Style & Image Consultant Srijani Roy Chowdhury MA (Journalism & Mass Communication), Certified Style & Image Consultant linkedin_icon Experience: 3 years
Fact-checked by , MBA, Certified Skin Care Coach Krati Darak MBA, Certified Skin Care Coach linkedin_icon Experience: 3 years
Last Updated on
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Winter isn’t always the best time of the year for those who are sensitive to cold. But you don’t have to miss Christmas dinners or New Year parties as long as you have the best thermal underwear for women. In this article, we will help you understand how to work your way from the inner lining to the outer layer when dressing up for the winters and how to choose good, fashionable thermal underwear. We’ve also listed our top picks of the best options you can try. Read on to know more.

Top PicksCheck Price
Best Squat-Proof Design:Thermajane Women's Thermal UnderwearPrice on Amazon
Best True-To-Size:Just Love Women's Thermal Underwear Pajama SetPrice on Amazon
Best Lightweight:Rocky Thermal UnderwearPrice on Amazon
Best Stretchable:Fruit of Loom Women's Micro Waffle Premium Thermal SetPrice on Amazon
Best Easy To Wash:Minus33 Merina Wool Ossipee Women’s Midnight Crew ThermalsPrice on Amazon
Duofold’s Original Women’s Thermal PantsPrice on Amazon
The Youth Micro-Elite Chamois Tights from Hot Chilly’sPrice on Amazon
Lululemon’s Swiftly Tech Long SleevePrice on Amazon

What Is The Best Way To Choose Thermals? – A Buying Guide

These are a few factors that you need to consider when buying thermals:

  • Material

This depends on where you are going, but the most common fabric is wool, for obvious reasons. Wool is the most viable, easily available, and easy-to-maintain fabric. There are other options too, like synthetic fabrics commonly fleece-lined ones, but they may throw up a stink. Silk is another good choice but only in medium cold weather. It is expensive but feels great on the skin.

  • Fit

Thermals should fit snugly on your body without being skin-tight. Make sure you go one size smaller because they tend to expand with use and bulk up under your clothes, which can get extremely uncomfortable.

  • Comfort

Thermals are supposed to be as comfortable as possible. Ensure they are of good quality and brand. Avoid wool if you have sensitive skin as it can cause irritation. Always try out a few inexpensive pieces from a brand and see how they feel in your everyday wear for a few days before investing in their more expensive thermals.

  • Breathability

Breathability is another vital factor you need to keep in mind. It refers to the garment’s ability to retain moist air between your skin and jacket without getting too saturated with moisture. A breathable garment helps you stay warmer for longer.

Now that you know what you need to keep in mind when buying thermals, here are the best ones that can get your hands on right now. Check them out!

10 Best Thermal Underwear For Cold Weather

1. Best Squat-Proof Design: Thermajane Women’s Thermal Underwear

Thermajane Women’s Thermal Underwear Image: Thermajane

The Thermajane Women’s Thermal Underwear is made of 92% polyester and 8% spandex. This cold-weather adventure gear has a squat-proof design that stays in place and boosts your confidence. The 4-way stretch fabric allows a wide range of motion and is not see-through and comfortable to wear. The firm elastic waistband provides a slim fit look. This non-bulky thermal underwear provides maximum breathability and does not cause any skin irritation. It is lightweight, soft, and enables flexible body movements.


  • Easy to wear pull-on closure
  • Machine washable
  • Ultra-soft
  • Moisture wicking fabric
  • 4-way stretch
  • Snug fit
  • Odor-free
  • All-day comfort


  • You may notice chaffing or fuzz balls after a few wears

Our Tester's Experience

"These Thermajanes offer excellent comfort and warmth. They are perfect for layering under clothes in the cold, harsh weather. They are very soft and can maintain even after washing."

protip_icon Caution
Overwashing your thermals can damage the fabric’s moisture-wicking properties. As you sweat less in winters, you can wear these delicates for 3-4 days without washing. Use a mild detergent to hand wash them.


Why We Think It's Worth Buying

The product has more than 31,519 reviews and is a top choice all around the world.

2. Best True-To-Size: Just Love Women’s Thermal Underwear Pajama Set

Just Love Women's Thermal Underwear Pajama Set Image: Just Love

The Just Love Women’s Thermal Underwear Pajama Set is made with a non-irritating and soft blend of 60% cotton and 40% polyester. The set consists of a long-sleeve shirt and thermal leggings. The thermal fabric traps heat and provides maximum insulation to keep you warm. This lightweight and breathable fabric of the pajama keeps you comfortable all night. The pajamas’ soft, flexible ribbed knit structure promotes heat retention. The long-sleeve top has a traditional crew collar, and the pants have an elastic waistband for a comfortable fit. In addition, this underwear set does not have loose threads and skipped stitches.


  • Suitable for plus sizes
  • Soft fabric
  • Moisture-wicking fabric
  • Shrink-resistant
  • Fade-resistant
  • Value for money
  • Long-lasting


  • None

Our Tester's Experience

"The PJ set has a good style and snowflake pattern, which I love. It is quite cozy and perfect to wear when it's chilly outside. There is enough room to the top as well as bottom. It also has an elastic waist that makes it a good fit."

3. Best Lightweight: Rocky Thermal Underwear


Stay warm and comfortable in the cold season with the Rocky Thermal Underwear. It is made from a soft and breathable blend of polyester and spandex. This odor-resistant thermal underwear is designed to keep you cozy without adding excess synthetic layers to your skin. The moisture-wicking fabric ensures that sweat is quickly drawn away from your skin, keeping you dry and comfortable even during high-intensity activities like skiing or snowboarding and outdoor adventures. The set features flatlock seams that prevent chafing and irritation, and a tagless design for added comfort. The elastic waistband and stretchy synthetic material provide a snug fit. Plus, it is machine washable.


  • Pull-on closure
  • Moisture-wicking fabric
  • Stretchable fabric
  • Snug fit
  • Great fit
  • Machine-washable


  • Fabric may pill

Our Tester's Experience

"I love wearing these thermals for my cold-weather outings. They are comfortable and feel lightweight. They fit snugly under other layers."

4. Uniqlo Heattech Jersey LeggingsUniqlo Heattech Jersey Leggings - Thermal Underwear For Women

Uniqlo Heattech Jersey Leggings can be worn while doing high-performance activities as well as when lounging around the house. They are made with a bio-warming, insulating, and moisture-retaining fabric. It has excellent temperature regulation properties. It is stretchy and has anti-static properties.

5. L.L Bean Lightweight Long Sleeve Base Layer

L.L Bean Lightweight Long Sleeve Crew Base Layer - Thermal Underwear For Women

L.L Bean Lightweight Long Sleeve Base Layer is designed for adventure with comfort. This lightweight base layer keeps you warm all day and is great for outdoor activities, like running, cycling, climbing, or camping. It wicks moisture to keep you dry and odor-free and to keep bacteria at bay. The stretchy fabric made up of recycled polyester blend sits snugly on your body.

6. Best Stretchable: Fruit of Loom Women’s Micro Waffle Premium Thermal Set  

Fruit of Loom Women's Micro Waffle Premium Thermal Set Image: Fruit Of The Loom

The Fruit of Loom Women’s Micro Waffle Premium Thermal Set is warm and cozy. This set contains a polyester-cotton thermal shirt and leggings. The micro waffle fabric traps body heat and provides optimum insulation to keep you comfortable on the coolest days. The lightweight set made from a breathable material regulates your body temperature and keeps you comfy all day. The soft and comfortable leggings have an elastic waistband and the shirt has ribbed cuffs and a crew collar. In addition, the set fits snugly on your body.


  • Ultra-soft fabric
  • Promotes flexibility
  • Moisture-wicking microfibers
  • Body temperature regulation
  • Tag-free
  • Chafe-resistant fabric
  • Snug fit
  • Pull-on closure
  • Machine-washable


  • Slightly see-through fabric

Our Tester's Experience

"This thermal set is true to size. It has a flattering, semi-snug silhouette, which makes it great for layering. The fabric is very soft. It provides warmth and does not cause any irritation."

7.  Best Easy To Wash: Minus33 Merina Wool Ossipee Women’s Midnight Crew Thermals

Minus33 Merina Wool Ossipee Women’s Midnight Crew Thermals Image: Minus33

This thermal top is made from 100% merino wool and has a seamless construction. It is easy to wash, dry, and maintain. Its stretchy fabric is ultra soft on the skin but keeps you warm by regulating your body temperature. Its flatlock seams prevent chafing on thighs, and its unique built-in UPF 50 technology protects you from the sun.


  • Easy to wear pull-on closure
  • Super soft
  • All-day comfort
  • Moisture-wicking properties
  • Provides UV protection
  • Suitable for all activities


  • The fabric may seem to be a little thin

Our Tester's Experience

"This thermal set has a very comfortable fit. It is quite versatile and can be worn as a base layer as well as a standalone piece of clothing. It is made of merino wool fabric that feels soft on the skin and is completely non-itchy."

protip_icon Pro Tip
If you wish to machine-wash merino wool thermals, use lukewarm or normal water with a wool-specific detergent and select gentle wash settings. Hang them to air dry away from heat and direct sunlight to make them last longer.

8. Duofold’s Original Women’s Thermal Pants

Duofold’s Original Women’s Thermal Pants Image: Duofolds

Duofold’s Original Women’s Thermal Pants are a unique offering of Champion. The pure cotton fabric on the inside of these quick-drying leggings for women feels soft on the skin, while the merino wool and cotton blend on the outside takes care of insulation and warmth. This cold-weather protection gear holds its shape well, is antimicrobial, and keeps the foul smell at bay with the help of its moisture-wicking technology. The active wear’s flatlock seams prevent chafing during outdoor activities.

9. The Youth Micro-Elite Chamois Tights from Hot Chilly’s

The Youth Micro-Elite Chamois Tights from Hot Chilly’s Image: Hot Chillys

The Micro-Elite Chamois Tights from Hot Chilly’s is one of their best-selling products since their inception in 1989. They are known to be the most reliable and durable base layer leggings that keep you warm and offer a four-way stretch and great moisture management. With a blend of polyester and spandex fibers, these layering essential high-performing tights will last you for years.

10. Lululemon’s Swiftly Tech Long Sleeve

Lululemon’s Swiftly Tech Long Sleeve Image: Lululemons

Lululemon’s Swiftly Tech Long Sleeve Crew can be used as a stand-alone top for running or layering for your cold-weather adventure. With four-way stretch, thumb cuffs, patented Silverescent technology, and no side seams, this body-hugging fit keeps you comfortable and stink-free.

You may have noticed that some of these products are called ‘thermals’ while others are named ‘base layers.’ If you were wondering if there’s any difference between the two, read the next section to clear any confusion.

*The prices provided in this article are based on the latest available information. However, they may vary due to changes in pricing by the seller and/or promotional offers.

Base Layers Vs. Thermals

Base Layers

A base layer is extremely tight and fits almost like second skin. Our bodies naturally sweat through our pores to maintain an average temperature, especially when we are fully covered with outerwear. The base layer, instead of your skin, absorbs sweat. Thus, wearing it in extremely cold conditions helps prevent evaporation of sweat into your clothes or body. In conclusion, a base layer is essentially a mechanism that prevents you from getting cold rather than keeping you warm. However, most brands give the best of both worlds – a base layer and thermals. Depending on the activity you will be involved in or your preference, you can go with either.


Thermals are garments you wear under your clothing. They are made with soft and breathable fabrics that keep you warm. They are snug and don’t feel bulky under your clothes. They, basically, act as a great additional layer in icy weather conditions.

Infographic: How To Buy Thermal Underwear For Women

Thermal underwear is an integral part of the winter wardrobe of women. It provides extra warmth and comfort during cold weather. However, with so many brands, materials, and styles available online, it can be challenging to know which type of thermal underwear will best suit your needs. To help you make the right choice, here is an infographic with tips to consider when shopping for thermal underwear. Have a look!

How To Buy Thermal Underwear For Women (infographic)

Illustration: StyleCraze Design Team

The Bottom Line

If you are sensitive to the cold, it is recommended to opt for good quality thermal underwear. These undergarments can be lifesavers during important events in winter. The thermal undies on our list are comfortable and are made with non-see-through fabric. The elastic waistband in these underpants provides a slimmer look while fitting according to your body type. Additionally, they each have unue pros that make them stand out. For example, the Thermajane Women’s Thermal Underwear offers effective thermal insulation and is suitable for those looking to add in various activities to their winter trip. The Just Love Women’s Thermal Underwear Pajama Set doubles as a cozy sleepwear and a pajama set, perfect for those spontaneous night camping or star-gazing trips. The Rocky Thermal Underwear is known for its durability and insulation that can withstand harsh winter conditions. Go through the reviews above to purchase thermal underwear that is not known to cause any irritation on the skin. Moreover, it is better to purchase the ones that enable flexible movements of the body.

Frequently Asked Questions

Should thermals be tight or loose?

Thermals should be tight and snug because they are worn under your clothes. Loose thermals allow heat loss from your body and bulk up under your clothes, making you feel uncomfortable.

Should you wear underwear with thermals?

Yes, for hygiene purposes, you need to wear underwear under thermals. Thermals are only a layer for extra warmth and not a replacement for underwear.

Is silk warmer than wool?

No. Wool is much warmer than silk.

How many times can you wear thermals?

Wear your thermals 3-4 times before washing them clean.

How many pairs of thermals do I need?

At least 2-3 pairs of thermals is enough for the winter season.

Does thermal underwear keep you warm?

Yes, thermal underwear offer light to medium protection from the cold.

How do you know what size thermal wear to get?

Opt for thermals that are a size smaller than your general loose-fitted clothes for a snug fit.

How do you wear thermals under jeans?

Look for lightweight thermal pants that fit snugly and not bunch up under your jeans.

Why Trust StyleCraze?

Pratima Ati, the author of this article, is a fashion enthusiast and believes fashion and comfort should go hand in hand. She has prepared this list of the best thermal underwear after browsing several online forums and reviewing user feedback. She has considered quality and comfort while picking the best for her readers. The products mentioned here provide comfortable mobility and flexibility.

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Carly Morrison
Carly is a talented designer and the founder of Dream & Drive lingerie based in Adelaide, South Australia. She specializes in designing vintage-inspired lingerie with a contemporary flair. Her collection features non-padded bras/bralettes, along with a range of knickers that balance cuteness with a hint of naughtiness.

Read full bio of Carly Morrison
Pratima Ati
Pratima AtiFashion & Lifestyle Writer
Pratima Ati is a postgraduate in International Business from Staffordshire University. After working in Marketing and Business Development for a few years, she jumped ship to pursue two things she loved – fashion and writing.

Read full bio of Pratima Ati
Srijani Roy Chowdhury
Srijani Roy Chowdhury Associate Commerce Editor
Srijani is an associate commerce editor with a master's degree in journalism and mass communication from the University of Calcutta, West Bengal. She is certified in makeup techniques and is also a certified style and image consultant.

Read full bio of Srijani Roy Chowdhury
Krati Darak
Krati DarakAssociate Commerce Editor
Krati is an associate commerce editor, a certified skin care coach, and a beauty enthusiast. She has a master’s degree in advertising and publishing relations from DAVV University and three years of experience in writing and editing for different niches.

Read full bio of Krati Darak