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Base Layers

(387 products)

Products (387)

Sort: Best Match

Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$90.00
56 reviews with an average rating of 4.6 out of 5 stars
SmartwoolClassic All-Season Merino T-Shirt - Men's
$80.00
53 reviews with an average rating of 4.2 out of 5 stars
REI Co-opMidweight Long-Sleeve Base Layer Top - Women's
$54.95
239 reviews with an average rating of 4.3 out of 5 stars
SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
$115.00
735 reviews with an average rating of 4.5 out of 5 stars
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women's
$39.95
4 reviews with an average rating of 4.8 out of 5 stars
Top Rated
InjinjiLiner Crew Socks
$12.00
357 reviews with an average rating of 4.7 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Men's
$39.83 - $79.95
124 reviews with an average rating of 4.4 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's
$115.00
615 reviews with an average rating of 4.7 out of 5 stars
REI Co-opMidweight Base Layer Tights - Women's
$54.95
89 reviews with an average rating of 4.1 out of 5 stars
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
$79.95
193 reviews with an average rating of 4.5 out of 5 stars
REI Co-opSilk Liner Crew Socks
$17.95
159 reviews with an average rating of 4.4 out of 5 stars
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$79.95
170 reviews with an average rating of 4.5 out of 5 stars
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's
$62.93 - $90.00
105 reviews with an average rating of 4.4 out of 5 stars
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$54.95
150 reviews with an average rating of 4.5 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
REI Co-opMerino 185 Base Layer Top - Women's
$69.95
41 reviews with an average rating of 4.4 out of 5 stars
PEARL iZUMiTransfer Liner Shorts - Men's
$60.00
9 reviews with an average rating of 4.1 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Women's
$79.95
103 reviews with an average rating of 4.3 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-opMidweight Base Layer Bottoms - Men's
$54.95
77 reviews with an average rating of 4.4 out of 5 stars
REI Co-opLightweight Crew Base Layer Top - Women's
$29.95
2 reviews with an average rating of 5.0 out of 5 stars
TerryAria Liner Shorts - Women's
$69.95
22 reviews with an average rating of 4.3 out of 5 stars
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$90.00
18 reviews with an average rating of 4.1 out of 5 stars
REI Co-opMerino Wool Liner Crew Socks
$15.95
165 reviews with an average rating of 4.4 out of 5 stars
InjinjiLiner Mini-Crew Socks
$11.00
5 reviews with an average rating of 3.8 out of 5 stars
Arc'teryxRho LT Base Layer Bottoms - Men's
$70.83 - $100.00
46 reviews with an average rating of 4.4 out of 5 stars
REI Co-opLightweight Half-Zip Base Layer Top - Women's
$44.95
1 reviews with an average rating of 5.0 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$29.83 - $59.95
132 reviews with an average rating of 4.6 out of 5 stars
SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's
$95.00
1 reviews with an average rating of 5.0 out of 5 stars
Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$69.83 - $140.00
10 reviews with an average rating of 4.9 out of 5 stars

1–30 of 387 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

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