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Base Layers

(437 products)

Products (437)

Sort: Best Match

SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
$90.93 - $130.00
188 reviews with an average rating of 4.3 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$79.93 - $115.00
1151 reviews with an average rating of 4.7 out of 5 stars
PatagoniaNether Bike Liner Shorts - Women's
$69.00
0 reviews
Helly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men's
$110.00
4 reviews with an average rating of 4.8 out of 5 stars
Arc'teryxIonia Merino Wool Logo Base Layer Shirt - Men's
$69.93 - $90.00
11 reviews with an average rating of 4.4 out of 5 stars
Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's
$100.00
0 reviews
Kari TraaFryd Base Layer Pants - Women's
$26.83 - $60.00
15 reviews with an average rating of 3.5 out of 5 stars
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
$66.83 - $135.00
21 reviews with an average rating of 4.7 out of 5 stars
Helly HansenLIFA Merino Midweight Graphic Base Layer Pants - Women's
$81.93 - $110.00
1 reviews with an average rating of 1.0 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Crew Neck Base Layer T-Shirt - Women's
$75.00
2 reviews with an average rating of 5.0 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
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95
13 reviews with an average rating of 4.9 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's
$85.00 - $100.00
11 reviews with an average rating of 3.8 out of 5 stars
Ortovox230 Competition Long-Sleeve Base Layer Top - Men's
$110.00
2 reviews with an average rating of 3.5 out of 5 stars
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$75.00
5 reviews with an average rating of 4.4 out of 5 stars
Top Rated
Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's
$61.83 - $125.00
31 reviews with an average rating of 4.6 out of 5 stars
Arms of Andes300 Lightweight Alpaca Wool Pullover Base Layer Hoodie - Women's
$140.00
1 reviews with an average rating of 5.0 out of 5 stars
Kari TraaRose Half-Zip Base Layer Top - Women's
$59.83 - $120.00
30 reviews with an average rating of 4.5 out of 5 stars
Top Rated
Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
$95.93 - $120.00
90 reviews with an average rating of 4.6 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
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
$56.83 - $115.00
1 reviews with an average rating of 5.0 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
Arc'teryxRho LT Crew Neck Base Layer Top - Men's
$79.93 - $100.00
27 reviews with an average rating of 4.8 out of 5 stars
Helly HansenLIFA Merino Midweight Graphic Base Layer Crew Top - Women's
$110.00
1 reviews with an average rating of 5.0 out of 5 stars
PEARL iZUMiTransfer Cargo Liner Shorts - Men's
$80.00
0 reviews
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$49.83 - $99.95
20 reviews with an average rating of 4.3 out of 5 stars
Kari TraaRose High-Waisted Base Layer Pants - Women's
$110.00
24 reviews with an average rating of 4.4 out of 5 stars
PatagoniaCapilene Thermal Weight Long Underwear Bottoms - Women's
$99.00
14 reviews with an average rating of 3.6 out of 5 stars
Top Rated
REI Co-opMidweight Crew Base Layer Top - Toddlers'
$24.95
14 reviews with an average rating of 4.7 out of 5 stars

121–150 of 437 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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