10 bestWomens Thermal Underwearof January 2026
112M consumers helped this year.
1

Merino.tech Merino Wool Base Layer Womens — 100% Merino Wool Long Sleeve Thermal Shirts Midweight + Wool Socks (Large, Black 250)
Merino.tech

9.8
2

Mountain Warehouse Talus Womens Long Sleeves Baselayer Top - Thermal Underwear, Lightweight Ladies Tee Shirt, Breathable, Easy Care - for Black Women's Size 12
Mountain Warehouse

9.6
3

Merino Wool Base Layer Womens Leggings 100% Merino Thermal Underwear Pants for Women Midweight + Wool Socks (Small, Black)
Merino.tech

9.5
38% off
4

DANISH ENDURANCE Thermal Tops Womens, Merino Wool Base Layer Thermal Long Sleeve Top Women, Warm Winter Thermals, Green, XL
DANISH ENDURANCE

9.3
5

Smartwool Women's Classic Thermal Merino Base Layer Bottom, Twilight Blue Heather, M
Smartwool

9.1
Other
6

Mountain Warehouse Talus Women Thermal Baselayer Pants - Lightweight, Breathable & Quick Drying Ladies Leggings - for Travel, Hiking, Camping, Skiing, Snowboard Black 12
Mountain Warehouse

8.9
7

iWoo Base Layer Womens Thermal Underwear Thin Top Bottoms Warm Long Sleeve Set Baselayer Long Johns Pretty Soft Manufacturer Size 6, (UK Size: XXL, Black)
iWoo

8.7
8

Mountain Warehouse Merino Womens Thermal Baselayer Top - Lightweight, Antibacterial & Breathable Ladies T Shirt - for Winter Travel, Hiking, Camping, Skiing, Snowboard Black 16
Mountain Warehouse

8.4
9

Helly Hansen Women's LIFA Long-Sleeve Crewneck Thermal Baselayer T-Shirt, 598 Navy, Medium
Helly Hansen

8.2
5% off
10

Icebreaker Women's Standard 175 Everyday Cold Weather Base Layer Thermal Leggings, Loden Green, M
Icebreaker

7.9
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