Page 2 of Baselayers

REI Co-opLightweight Base Layer Tights - Women's

$39.95

1 reviews with an average rating of 5.0 out of 5 stars

Top Rated

Arc'teryxIonia Merino Wool Base Layer Hoody - Men's

$140.00

49 reviews with an average rating of 4.9 out of 5 stars

PatagoniaCapilene Midweight Base Layer Bottoms - Women's

$89.00

25 reviews with an average rating of 4.1 out of 5 stars

SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's Plus Sizes

$115.00 - $120.00

19 reviews with an average rating of 4.4 out of 5 stars

SmartwoolIntraknit Active Long-Sleeve Base Layer Top - Women's

$110.00

1 reviews with an average rating of 5.0 out of 5 stars

IcebreakerMerino 200 Oasis Thermal Leggings - Women's

$105.00

66 reviews with an average rating of 4.4 out of 5 stars

Top Rated

SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's

$83.93 - $120.00

26 reviews with an average rating of 4.8 out of 5 stars

REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes

$16.83 - $69.95

20 reviews with an average rating of 3.8 out of 5 stars

Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's

$85.00

2 reviews with an average rating of 5.0 out of 5 stars

SmartwoolClassic All-Season Merino 3/4 Base Layer Bottoms - Men's

$75.00

2 reviews with an average rating of 5.0 out of 5 stars

Top Rated

SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's

$105.00

84 reviews with an average rating of 4.7 out of 5 stars

PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's

$99.00

14 reviews with an average rating of 4.0 out of 5 stars

Arc'teryxRho Base Layer Bottoms - Women's

$70.83 - $100.00

27 reviews with an average rating of 4.0 out of 5 stars

Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's

$135.00

15 reviews with an average rating of 3.9 out of 5 stars

Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's

$115.00 - $135.00

8 reviews with an average rating of 3.8 out of 5 stars

PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's

$109.00

18 reviews with an average rating of 4.0 out of 5 stars

Ortovox185 Rock'n'wool Short Base Layer Pants - Men's

$100.00

5 reviews with an average rating of 4.2 out of 5 stars

Icebreaker200 Oasis Crewe Base Layer Top - Men's

$95.00

29 reviews with an average rating of 4.5 out of 5 stars

Top Rated

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes

$79.95

26 reviews with an average rating of 4.5 out of 5 stars

Top Rated

PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's

$99.00

61 reviews with an average rating of 4.6 out of 5 stars

SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's

$90.00

13 reviews with an average rating of 4.3 out of 5 stars

Top Rated

IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's

$125.00

57 reviews with an average rating of 4.7 out of 5 stars

Top Rated

PatagoniaCapilene Midweight Crew Base Layer Top - Men's

$89.00

79 reviews with an average rating of 4.5 out of 5 stars

REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes

$39.83 - $79.95

8 reviews with an average rating of 3.9 out of 5 stars

Kari TraaEmbla Wool Base Layer Top - Women's

$60.00

0 reviews

Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's

$80.00

0 reviews

Icebreaker125 ZoneKnit Base Layer Leggings - Men's

$125.00

0 reviews

Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's

$125.00

4 reviews with an average rating of 5.0 out of 5 stars

Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's

$130.00

7 reviews with an average rating of 3.6 out of 5 stars

Top Rated

Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's

$125.00

51 reviews with an average rating of 4.6 out of 5 stars

Filter

Filter by Categories

Filter by Gender

Filter by Underwear Weight

Filter by Fabric Type

Filter by Size Type

Filter by Size

Filter by Brand

Filter by Features

Filter by Shirt Type

Filter by Color

Filter by Fabric Pattern

Filter by Deals

Filter by Product Line

Filter by Best Use

Filter by Sleeve Length

Filter by Sustainability

Filter by Inseam (in.)

Filter by Rating

Filter by Price

REI Co-opLightweight Base Layer Tights - Women's

Arc'teryxIonia Merino Wool Base Layer Hoody - Men's

PatagoniaCapilene Midweight Base Layer Bottoms - Women's

SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's Plus Sizes

SmartwoolIntraknit Active Long-Sleeve Base Layer Top - Women's

IcebreakerMerino 200 Oasis Thermal Leggings - Women's

SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's

REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes

Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's

SmartwoolClassic All-Season Merino 3/4 Base Layer Bottoms - Men's

SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's

PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's

Arc'teryxRho Base Layer Bottoms - Women's

Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's

Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's

PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's

Ortovox185 Rock'n'wool Short Base Layer Pants - Men's

Icebreaker200 Oasis Crewe Base Layer Top - Men's

REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes

PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's

SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's

IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's

PatagoniaCapilene Midweight Crew Base Layer Top - Men's

REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes

Kari TraaEmbla Wool Base Layer Top - Women's

Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's

Icebreaker125 ZoneKnit Base Layer Leggings - Men's

Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's

Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's

Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's

Related Expert Advice articles

The 5 Best Base Layers of 2025: Staff Picks

How to Choose Hiking Underwear

Layering Basics