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Base Layer

(432 products)

Products (432)

Sort: Best Match

PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's
$99.00
10 reviews with an average rating of 4.3 out of 5 stars
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's
$99.00
28 reviews with an average rating of 4.4 out of 5 stars
SmartwoolClassic All-Season Merino T-Shirt - Women's
$55.93 - $80.00
75 reviews with an average rating of 4.2 out of 5 stars
Kari TraaFryd Base Layer Pants - Women's
$60.00
15 reviews with an average rating of 3.5 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Bottoms - Kids'
$34.95
8 reviews with an average rating of 4.6 out of 5 stars
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Men's
$130.00
22 reviews with an average rating of 4.2 out of 5 stars
Kari TraaFryd Base Layer Top - Women's
$29.83 - $60.00
22 reviews with an average rating of 4.0 out of 5 stars
REI Co-opMidweight Base Layer Half-Zip Top - Women's
$29.83 - $59.95
134 reviews with an average rating of 4.4 out of 5 stars
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$49.83 - $104.95
14 reviews with an average rating of 3.9 out of 5 stars
PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's
$109.00
14 reviews with an average rating of 4.1 out of 5 stars
Top Rated
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00
37 reviews with an average rating of 4.6 out of 5 stars
Ortovox230 Competition Zip-Neck Base Layer Top - Men's
$120.00
3 reviews with an average rating of 3.7 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Crew Top - Kids'
$34.95
5 reviews with an average rating of 5.0 out of 5 stars
Top Rated
REI Co-opLightweight Base Layer Tights - Women's
$39.95
7 reviews with an average rating of 4.6 out of 5 stars
PatagoniaDirt Roamer Bike Liner Shorts - Men's
$99.00
0 reviews
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$85.93 - $115.00
1505 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$120.00
16 reviews with an average rating of 4.6 out of 5 stars
Arc'teryxRho Crew Neck Long-Sleeve Base Layer Top - Women's
$100.00
8 reviews with an average rating of 4.4 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes
$79.95
13 reviews with an average rating of 3.9 out of 5 stars
Top Rated
REI Co-opMerino Midweight Base Layer Bottoms - Kids'
$49.95
15 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMerino Midweight Base Layer Crew Top - Kids'
$49.95
25 reviews with an average rating of 4.7 out of 5 stars
Helly HansenHH Durawool T-Shirt - Women's
$80.00
0 reviews
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$59.83 - $115.00
1152 reviews with an average rating of 4.7 out of 5 stars
Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's
$100.00
3 reviews with an average rating of 4.0 out of 5 stars
Top Rated
Arc'teryxIonia Merino Wool Logo Base Layer Shirt - Men's
$59.83 - $90.00
16 reviews with an average rating of 4.5 out of 5 stars
Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$110.00
10 reviews with an average rating of 4.2 out of 5 stars
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
$135.00
24 reviews with an average rating of 4.6 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$130.00
188 reviews with an average rating of 4.4 out of 5 stars
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's
$105.00
12 reviews with an average rating of 4.3 out of 5 stars
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$79.95
8 reviews with an average rating of 4.9 out of 5 stars

91–120 of 432 products

Sort: Best Match

Related Expert Advice articles

What material is best?

Wool is moisture-wicking and odor-resistant, while synthetic fabrics are more durable and less expensive.

Match the temp to the trek

Lightweight layers are best for moderate to cool temperatures. Midweight layers are best for cold temperatures. Heavyweight layers are best for below-freezing temperatures.

Find your fit

To be able to wick sweat efficiently, your next-to-skin layer needs to actually be next to your skin. A comfortably snug fit everywhere is your goal.

Read full article: How to Choose Base Layers