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Men's Base Layers

(119 products)

Products (119)

Sort: Best Match

REI Co-opMerino 185 Base Layer Bottoms - Men's
$39.83 - $55.89
Save 30% - 50%
compared to $79.95
124 reviews with an average rating of 4.4 out of 5 stars
Sale Ends May 26
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$89.99
Save 25%
compared to $120.00
15 reviews with an average rating of 4.9 out of 5 stars
Sale Ends May 26
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$41.89
Save 30%
compared to $59.95
133 reviews with an average rating of 4.6 out of 5 stars
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$49.83 - $73.39
Save 30% - 52%
compared to $104.95
14 reviews with an average rating of 3.9 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Base Layer Bottoms - Men's
$89.00
56 reviews with an average rating of 4.5 out of 5 stars
Sale Ends May 26
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$86.19
Save 25%
compared to $115.00
1505 reviews with an average rating of 4.7 out of 5 stars
Sale Ends May 26
REI Co-opMidweight Base Layer Bottoms - Men's
$38.39
Save 30%
compared to $54.95
77 reviews with an average rating of 4.4 out of 5 stars
Sale Ends May 26
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$55.89
Save 30%
compared to $79.95
172 reviews with an average rating of 4.5 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
Sale Ends May 26
Top Rated
REI Co-opLightweight Base Layer Bottoms - Men's
$27.89
Save 30%
compared to $39.95
6 reviews with an average rating of 5.0 out of 5 stars
Sale Ends May 26
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$38.39
Save 30%
compared to $54.95
150 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
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
Sale Ends May 26
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$67.49
Save 25%
compared to $90.00
56 reviews with an average rating of 4.6 out of 5 stars
Sale Ends May 26
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$62.89
Save 30%
compared to $89.95
103 reviews with an average rating of 4.6 out of 5 stars
Sale Ends May 26
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$27.89
Save 30%
compared to $39.95
1 reviews with an average rating of 5.0 out of 5 stars
Sale Ends May 26
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$67.49
Save 25%
compared to $90.00
18 reviews with an average rating of 4.1 out of 5 stars
Sale Ends May 26
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.69
Save 25%
compared to $105.00
122 reviews with an average rating of 4.7 out of 5 stars
Sale Ends May 26
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$93.69
Save 25%
compared to $125.00
51 reviews with an average rating of 4.6 out of 5 stars
tasc PerformanceElevation Merino T-Shirt - Men's
$49.73
Save 37%
compared to $79.00
38 reviews with an average rating of 4.2 out of 5 stars
REI OUTLET
Sale Ends May 26
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$97.49
Save 25%
compared to $130.00
189 reviews with an average rating of 4.4 out of 5 stars
Sale Ends May 26
REI Co-opMerino 185 Base Layer Top - Men's
$48.89
Save 30%
compared to $69.95
51 reviews with an average rating of 4.2 out of 5 stars
tasc PerformanceElevation Merino Base Layer Bottoms - Men's
$49.73
Save 37%
compared to $79.00
29 reviews with an average rating of 3.8 out of 5 stars
REI OUTLET
Icebreaker200 Sonebula Leggings - Men's
$89.73
Save 25%
compared to $120.00
4 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Free CountryMicrotech Heat Cocaber Base Layer Top - Men's
$26.73
Save 33%
compared to $40.00
2 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
$49.83
Save 50%
compared to $99.95
7 reviews with an average rating of 4.4 out of 5 stars
Top Rated
Arc'teryxRho Heavyweight Base Layer Bottoms - Men's
$84.83
Save 29%
compared to $120.00
62 reviews with an average rating of 4.7 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Crew Base Layer Top - Men's
$89.00
80 reviews with an average rating of 4.5 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
PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's
$99.00
14 reviews with an average rating of 4.0 out of 5 stars

1–30 of 119 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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