Best Polyester Womens Athletic Base Layers in 2026

Machine wash cold, Import

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.

Our Most Legendary: Super-light HeatGear fabric delivers superior coverage without weighing you down

Material wicks sweat & dries really fast

4-way stretch construction moves better in every direction

TSLA Thermal Shirt Series designed for cold weather.

[Materials] Mix of Polyester & Spandex fabric is excellent elasticity with enhanced range of motion.

[Fleece Lining] Thermal fleece lining designed to enhance the warmth and thermal insulation.

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.

QUALITY MIDWEIGHT BASELAYER: 100% Merino Wool is super soft and extremely comfortable. This three season merino wool crew neck thermal has the versatility and warmth to make this an essential part of your outdoor gear. Its moisture wicking properties means you won’t have to wash it as often so you’ll use even less water. Sizes XS to 3XL in a regular fit. Minus33 offers a great size selection. Outfitting anyone from the Hard-at-Work to the Hard-at-Play.

PERFECT TO WEAR: for any activity. Wear this top as a base layer to go skiing, snowboarding, hiking, running, ice fishing, hunting, the activities are endless! This midweight long sleeve can be worn whether it's as low as 0 degrees or as high as 60. Our crew has tagless construction so you don't have to worry about the annoyance of the unwanted itch. You can wear this long sleeve as a base layer, mid layer, or even outer layer so you can get as many uses out of it as you would like!

EXPERIENCED BRAND: Although there are many copy-cats on the market today, Minus33 has been a trusted brand since 2004. We see it all – from beautiful fall leaves, to white, snowy winters, to colorful springs and summers. We’re New Englanders, plain and simple. We’ve been hiking, camping, skiing, and everything else in between since we were kids. No amount of snow keeps us down, and we only continue to thrive in the summer.

Material: 87% merino wool, 13% nylon

Insulation Weight: lightweight (150g/m2)

Fit: slim

MIDWEIGHT – Womens Wool Base Layer Top Available in: Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino Wool Zip Sweater Women Midweight 250 g/m² + Wool Socks. Cool Packaging! MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 18.5 Micron Zip Up Wool Sweater for Women provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

MOISTURE WICKING & ODOR RESISTANT – Womens Quarter Zip Wool Sweater natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.

UA Base 2.0 Active Baselayer is lightweight, flexible & breathable for high activity performance in cool conditions

UA Scent Control Technology to keep you undetected in all pursuits

Soft, brushed grid interior traps air against your skin, closely managing your body's microclimate to keep you warm & comfortable

HEAVYWEIGHT – Womens Wool Base Layer Top Available in Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino Wool Zip Sweater Women Heavyweight 250 g/m² + Wool Socks. Cool Packaging! MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 18.5 Micron Zip Up Wool Sweater for Women provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

MOISTURE WICKING & ODOR RESISTANT – Womens Quarter Zip Wool Sweater natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.

FEATURES -- Quick Dry, Anti-Odor, 4-Way Stretch, Lightweight, Breathable, Ultra-Soft, Fitted, Tag-Free -- Perfect for your basic needs and everyday acitivities. Offers maximum stretch while being lightweight, comfortable, and snug fitting. Make this your go-to legging 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. Quick dry technology wicks away all moisture leaving you comfortable and dry. 4-way stretch moves with your body allowing for full freedom of motion and comfort.

LOUNGING -- Perfect for lounging around at home. Or as tight fitted top bottom for sleeping. Spandex adds additional stretch for full range of motion and comfort. ***Please note this shirt is tight fitting, so if you want a looser fit you should buy 1 size up.***

NOTE: Store KLOTHO is the only distributor, PLEASE NOTE. Material: Soft and stretchy. Super comfy and light weight but not too sheer. Breathable fabric that retains shape and doesn't shrink.

Style: Well made and beautiful fit, slim fit but not too tight. Sexy short corp top which stay right above your belly button and makes you look taller.

Occasion: Casual wear or workout. You can wear to the gym, yoga, hang out or Cosplay. Great for dress up in Halloween, nice gift.

Super-light HeatGear fabric delivers superior coverage without weighing you down

Material wicks sweat & dries really fast

Strategic mesh panels for added breathability

Quick dry technology

Lightweight flexible and durable

Crew neck construction

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

Material wicks sweat & dries really fast

Encased elastic waistband sits just right on the hips

Ready for Adventure: Enjoy the ultimate cold weather adventure with the Icebreaker Merino Women’s Standard 175 Everyday Half Zip Pullover with Long Sleeves! This Merino wool base layer for women is lightweight and ideal for outdoor activities.

Incredibly Soft Zip Top: These hiking shirts for women are made with 100% Pure Merino Wool, an annually renewable resource that naturally helps regulate body temperature and resists odors. This women’s base layer is moisture managing with a slim fit.

All Day Comfort: These women’s thermal tops are long sleeve, with a half-zip for breathable versatility, and forward set side seams for lasting comfort. Our ski thermals for women have stretchy ribbed fabric and will fit under mid or outer layers.

Ultra-soft double-knit fabric is breathable & comfortable

Inseam: YMD 25" (+/- 1.5" per size)

Pockets: No

【Breathable & Quick-dry】This cycling undershirt designed with big hole mesh, high moisture wicking and venting. Which can quickly removes sweat from your body and helps you stay comfortable and dry during cycling sessions

【 Sleeveless Ergonomic Fit】Special sleeveless cutting let the singlet can be wearing as a layer under any sport clothes.

【Premium Material】lightweight and compression, the high stretch baselayer will give you high performance and exceptional comfort without any itching feelings

Slim fit sits close to the body

Extra-long body allows you to strap in without your shirt coming untucked

DRYRIDE Ultrawick midweight fabric pulls moisture away from your skin

UA Base 2.0 Active Baselayer is lightweight, flexible & breathable for high activity performance in cool conditions

UA Scent Control Technology to keep you undetected in all pursuits

Soft, brushed grid interior traps air against your skin, closely managing your body's microclimate to keep you warm & comfortable

【Feature】- Hitting the gym? Our full-length and cropped leggings will wick away sweat as you train with zoned compression. When feeling nothing is everything. YIVISE Womens Workout Collection. From shorts and leggings to sweatpants and trousers, our women's bottoms are here for you whether you're running, training, stretching or relaxing. Max out your stride in loose-fitting shorts with pockets for storage, or focus on your yoga practice in a tighter pair that will free you from distraction.

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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

Seamless Construction

Avra fabric provides moisture wicking

Ideal as your base layer on high output, cold winter activities

NORDIC PERFORMANCE: Designed in Sweden - a land blessed with 200 days of challenging conditions. Our highly functional Active Intensity Pants are built for dedicated athletes who work out with a purpose.

INNOVATIVE: Keeps you dry and comfortable during intensive training in medium cold to cold temperatures.

FUNCTIONAL: Stretchy, soft material with seamless construction, zone-adapted design and ergonomic fit.

ACTIVE FIT - Designed to follow the lines of the body, usually with some amount of stretch fabric. These garments have a lighter feeling fit, with less bulk than a relaxed fit thermal base layer. They are especially perfect for year round, multipurpose use under layers.

UPF 40+ - Ultraviolet Protection Factor. Sunlight includes rays of ultraviolet (UV) radiation, and Hot Chillys products are designed to help protect you!

WARMTH FACTOR 10/10 - Ranked from Mild to Hot, the Warmth Factor Thermometer tells you how warm each of our products is. Warmth Factors 6, 7, and 8 are considered Midweight and are very popular for most cold-weather activities.

【Feature】- Hitting the gym? Our full-length and cropped leggings will wick away sweat as you train with zoned compression. When feeling nothing is everything. YIVISE Womens Workout Collection. From shorts and leggings to sweatpants and trousers, our women's bottoms are here for you whether you're running, training, stretching or relaxing. Max out your stride in loose-fitting shorts with pockets for storage, or focus on your yoga practice in a tighter pair that will free you from distraction.

【Feature】- high waisted active shorts black shorts tight shorts mens jersey shorts white high waisted bell bottom jeans corduroy shorts designer shorts hot yoga pants baggy shorts high rise shorts ripped jean shorts boyfriend shortsripped denim shorts yoga pants linen shorts romper shorts jumpsuit shorts mini shorts tight yoga pants shorts knit shorts petite sweatpants black shorts walking shorts hot shorts leggings shorts white jean shorts bikini workout pants vintage shorts tactical shorts

men's soft cotton casual long sleeve pullover crewneck sweater matching family pajamas sets christmas pj's with christmas print long sleeve tee and plaid pants loungewear shirts tide hip hop t shirt cotton casual crew neck short sleeve tee tops for men women pants casual shorts cargo flat front denim pleated shorts active active hoodies active sweatshirts track active active shirts active vests active pants active shorts active base layers active underwear tees 2021 mens shirt golf dress

Body mapped with different structures for optimal thermoregulation

Lightweight and warming yarn for optimal thermoregulation

Keeps you body dry and comfortable by the excellent wicking effect

ACTIVE FIT - Designed to follow the lines of the body, usually with some amount of stretch fabric. These garments have a lighter feeling fit, with less bulk than a relaxed fit thermal base layer. They are especially perfect for year round, multipurpose use under layers.

UPF 40+ - Ultraviolet Protection Factor. Sunlight includes rays of ultraviolet (UV) radiation, and Hot Chillys products are designed to help protect you!

WARMTH FACTOR 10/10 - Ranked from Mild to Hot, the Warmth Factor Thermometer tells you how warm each of our products is. Warmth Factors 6, 7, and 8 are considered Midweight and are very popular for most cold-weather activities.

ACTIVE FIT AND UPF 40+ - Designed to follow the lines of the body, usually with some amount of stretch fabric. These garments have a lighter feeling fit, with less bulk than a relaxed fit thermal base layer. They are especially perfect for year round, multipurpose use under layers. Ultraviolet Protection Factor. Sunlight includes rays of ultraviolet (UV) radiation, and Hot Chillys products are designed to help protect you!

MECHANICAL STRETCH. Engineered to stretch and move with you, providing all over fit, warmth and expedited moisture movement.

WARMTH FACTOR 10/10 - Ranked from Mild to Hot, the Warmth Factor Thermometer tells you how warm each of our products is. Warmth Factors 6, 7, and 8 are considered Midweight and are very popular for most cold-weather activities.

Zippered center front allows for customized ventilation

Contrast flatlock stitching

High performance comfort