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Men's Base Layers

(128 products)

Products (128)

Sort: Best Match

Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$115.00
1499 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's
$115.00
631 reviews with an average rating of 4.7 out of 5 stars
REI Co-opMidweight Base Layer Bottoms - Men's
$54.95
91 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$54.95
178 reviews with an average rating of 4.5 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Men's
$79.95
140 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
$79.95
209 reviews with an average rating of 4.5 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$120.00
43 reviews with an average rating of 4.6 out of 5 stars
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$27.93 - $39.95
27 reviews with an average rating of 4.3 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Base Layer Bottoms - Men's
$89.00
58 reviews with an average rating of 4.5 out of 5 stars
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$90.00 - $100.00
82 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$89.95
116 reviews with an average rating of 4.5 out of 5 stars
tasc PerformanceElevation Merino Base Layer Bottoms - Men's
$34.73 - $54.73
Save 30% - 56%
compared to $79.00
38 reviews with an average rating of 3.9 out of 5 stars
REI OUTLET
Top Rated
REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
$99.95
12 reviews with an average rating of 4.7 out of 5 stars
Top Rated
Arc'teryxRho LT Base Layer Hoody - Men's
$120.00
51 reviews with an average rating of 5.0 out of 5 stars
REI Co-opLightweight Base Layer Bottoms - Men's
$39.95
20 reviews with an average rating of 4.5 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Crew Base Layer Top - Men's
$89.00
87 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$59.95
167 reviews with an average rating of 4.6 out of 5 stars
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$99.95
32 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Dec 29
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$78.69
Save 25%
compared to $105.00
69 reviews with an average rating of 4.7 out of 5 stars
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$93.69
Save 25%
compared to $125.00
66 reviews with an average rating of 4.7 out of 5 stars
tasc PerformanceElevation Merino T-Shirt - Men's
$54.73
Save 30%
compared to $79.00
45 reviews with an average rating of 4.3 out of 5 stars
REI OUTLET
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$93.69
Save 25%
compared to $125.00
66 reviews with an average rating of 4.7 out of 5 stars
Top Rated
Free CountryForce Grid Fleece Base Layer Top - Men's
$29.73
Save 33%
compared to $45.00
12 reviews with an average rating of 4.8 out of 5 stars
REI OUTLET
PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's
$109.00
23 reviews with an average rating of 4.0 out of 5 stars
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.69
Save 25%
compared to $105.00
195 reviews with an average rating of 4.7 out of 5 stars
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$90.00
21 reviews with an average rating of 4.1 out of 5 stars
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$104.95
17 reviews with an average rating of 4.1 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$130.00
192 reviews with an average rating of 4.4 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's
$105.00
85 reviews with an average rating of 4.6 out of 5 stars
SmartwoolClassic All-Season Merino T-Shirt - Men's
$80.00 - $95.00
93 reviews with an average rating of 4.0 out of 5 stars

1–30 of 128 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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