Best M Womens Base Layers in 2026

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.

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 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.

Dual-layer fabric with an ultra-warm, brushed interior & a smooth, fast-drying exterior

Material wicks sweat & dries really fast

Mesh underarm panels for added ventilation where you need it

FEATURES: Quick Dry, Anti-Odor, 4-Way Stretch, Lightweight, Breathable, Ultra-Soft, Fitted, Tag Free Label. Perfect for your basic needs and everyday activities. Offers maximum stretch while being lightweight, comfortable, and snug fitting. Make this your go-to thermal bottom as your first layer on a long run or your only layer while lounging on the couch or sleeping at night.

FABRIC: 90% Polyester, 10% Spandex. Lightweight knit with a lot of stretch. Lightly brushed on both sides which gives a soft cozy feel that is smooth against the body.

COLD WEATHER: Lightweight warmth, can be worn invisibly as first layer underneath any other clothing.

Design for Multiple. Beat the chill, trap the heat, fleece lined for the cold.

Soft thermal fleece lined brick the wind and keep you warm. 4-Way stretch, moderate compression.

28'' inseam, full length leggings, intended to sit at ankle.

Ready for Adventure: Always enjoy cold weather adventures with the Icebreaker Merino Women’s 175 Standard Merino Wool Shirt! These women’s thermals are long sleeve and feature a comfortable crew neck for year-round layering performance and style.

Amazingly Soft Women’s T-Shirts: These long sleeve tee shirts for women are made with 100% Merino Wool, an annually renewable resource that naturally resists odors, regulates body temperature in all weather conditions, and helps manage moisture.

All Day Comfort: Breathable and versatile, this women’s long sleeve tee shirt is quick-drying, with offset shoulder seams to reduce chafing, and ribbed fabric for all day comfort ; This is a slim fit long sleeve shirt for women for classic style.

COLD WEATHER BASE LAYER. We've updated these bottoms to bring you a better fitting, more functional tight. Our warmest-weight 100% Merino wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

SLIM FIT. Designed to meet the demands of outdoor adventuring, these slim fit bottoms show off a slimming silhouette while offering unrestricted movement through the legs. Inseam: 30"

CLASSIC THERMAL MERINO. Ideal for cold-weather activities where warmth and breathability are crucial, this midweight fabric used a 100% Merino wool construction that helps move moisture away from skin to keep you warm and dry.

✅[ALL-DAY COMFORTABLE WEARING EXPERIENCE]: Thermal underwear women set made of 92% Soft Polyester / 8% Spandex fabric that feels cozily soft with fleece lined, lightweight but warm, long johns for women thermal sets give you a sense of security throughout the winter. Ladies thermal underwear set combines performance with fashion to give you a more streamlined look.

✅[STRONG MOISTURE WICKING]: Wool thermal underwear women moisture transport system, wick away sweat fast to keep you dry and light. A perfect blend of comfort, warmth, elasticity, and moisture protection. You can relax or brave the outdoors pursuing your active lifestyle at any time.

✅[FLEXIBILITY FOR ANY MOVEMENT]: This female thermal underwear adopts the latest Four-Way stretch, delivers full mobility and a squat proof design, gives you flexibility by hugging your body to move, you’ll feel a sense of freedom in all your activities, they will keep you warm without sacrificing your range of motion or comfort, whether sports, shopping, or leisure.

Preserve Heat Effectively: Designed with ultra-soft lining fleece, the thermal underwear for women keeps the cold air out and preserve heat effectively in extreme cold weather.Also, the intricate and professional seaming reduces heat dispeating. Base layer women keep you in cold weather warm during yoga, skiing, running, jogging, hiking, riding, walking the dog.

Multi-functional Advanced Material: Superior to fabrics, as the only advanced bamboo charcoal long johns for women , it performs well on moisture wicking, heat retention and comfort. The bamboo charcoal fiber takes in three times water than other fabrics .Consequently it gets rid of moisture faster,and wick away moisture to keep you cozy with no sticky or clammy feeling.

4-Way Stretch Compression Suits：The non abrasion fabric material with excellent elasticity and durability makes women's thermal underwears high elastic, with a added range of motion and offers maximum freedom and support to your body. Besides, designed to increase blood flow and amount of oxygen in the blood,the thermal underwear for women improve blood circulation, protect you from muscle injury，perfectly fitting for sport activities.

Material: 87% merino wool, 13% nylon

Insulation Weight: lightweight (150g/m2)

Fit: slim

LIGHTWEIGHT & FRESH - super lightweight, ultra breathable and wicking fabric moves sweat away, feel smooth against your skin

COMFORT & STRETCH - move comfortably with 4-way stretch, gusseted crotch and chafe-free flatlock seam construction

STREAMLINED FIT - sits perfectly under your clothing without adding any bulk, wide elastic waistband brushed for next-to-skin softness

Lightweight, 100% lifa technology - superior moisture management

Made of super comfortable fabric : Silky sleek, comfort and soft. Great option for everyday wear or as a underscrubs piece or loungewear at home.

Snug fitting and soft for layering : Works great under scrubs, under uniforms, sweaters, blazers, jackets and coats, would be a staple.

Elastic material : Figure hugging easy to fit any body figure and you will feel close but free/relaxed under this t shirt, slim design will show your perfect curves.

Womens 2-Piece Thermal Base Layer Set. Active Stretch Fabric Provides Easy, Flexible Movement All Day. Designed To Keep The Warmth In and The Chill Out.

ACTIVE STRETCH: Moves and Stretches with the Body, Flexible & Comfort Fit. Keeps You Warm and Provides Flexible Movement.

BREATHABLE: Innovative Finish that Allows Fabric to Breathe. Great Performance In Warm Or Cool Weather. Crafted with Dri Fusion Tech.

Base Layer: Offering thermal warmth, our heavyweight base layer 2-piece set will keep you cozy in the cold with a brushed fleece inside and matte soft outside. A close-to-the-body fit and tightly knit-fabric to wear under or on its own.

Moisture Wicking: Fabric helps to wick away moisture for stay dry comfort and warmth. The breathable densely knit fabric allows for maximized airflow and has a UV protection of 50+.

Stretch: Spandex stretches to move with you for flexible on-the-go comfort. Helps hug your body for a snug long underwear fit and comfy warmth retention. Delivers full mobility with no-bagging at the knees.

Made of 86% Polyester and 14% Spandex, this New Balance Women's Long Sleeve Base Layer Shirt will keep you warm and comfortable during all of your activities. Available in mutliple colors and in sizes X-Small, Small, Medium, Large and X-Large.

The overlapped thumbhole makes it easy to layer while you're hiking, running, walking or just out and about. This helps to keep the layers in place should you need to remove other layers. In addition, the raglan sleeves provides ease of motion.

The base layer top features a tradtional straight hem with a self-fabric collar to ensure you are comfortable all day. The interior necktape is branded and features the New Balance flying logo.

OFFICIAL REEBOK: Performance Base Layer Thermal Underwear for Women; Greatness doesn’t come from standing still, Living an active life enables people to be their best selves

MOISTURE CONTROL: Women’s athletic performance compression leggings wick moisture to keep you dry during intense workouts, practices, and games

PERFORMANCE STRETCH: Compression leggings for women have a stay put design and a long length leg so they won't ride up; Stretch fabric offers a full range of motion for peak performance

4-way stretch fabric enhances comfort and mobility

Insulating and wind resistant material keeps the heat in and the cold out

Wicking technology pulls moisture away from the body, leaving you drier and warmer

Next-to-skin fit hugs the body

Women's-specific contoured waistband; Four-way stretch fabrication for enhanced mobility

Living Lining helps regulate your temperature; Quick-drying and highly breathable; Chafe-free softlock seams for added comfort