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Men's Base Layers

(121 products)

Products (121)

Sort: Best Match

SmartwoolClassic All-Season Merino 3/4 Base Layer Bottoms - Men's
$85.00
4 reviews with an average rating of 4.3 out of 5 stars
tasc PerformanceElevation Merino Base Layer Bottoms - Men's
$34.73 - $54.73
Save 30% - 56%
compared to $79.00
43 reviews with an average rating of 4.0 out of 5 stars
REI OUTLET
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
10 reviews with an average rating of 4.4 out of 5 stars
PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's
$99.00
16 reviews with an average rating of 4.1 out of 5 stars
Sale Ends Mar 23
REI Co-opMerino 185 Base Layer Top - Men's
$52.39
Save 25%
compared to $69.95
58 reviews with an average rating of 4.3 out of 5 stars
Arc'teryxRho SV Zip-Neck Base Layer Top - Men's
$140.00
13 reviews with an average rating of 3.8 out of 5 stars
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$140.00
18 reviews with an average rating of 4.3 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's
$115.00
85 reviews with an average rating of 4.6 out of 5 stars
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$130.00
34 reviews with an average rating of 4.7 out of 5 stars
Arc'teryxRho LT Base Layer Bottoms - Men's
$100.00
59 reviews with an average rating of 4.4 out of 5 stars
PatagoniaCapilene Midweight Zip-Neck Long Underwear Top - Men's
$63.73
Save 35%
compared to $99.00
75 reviews with an average rating of 4.4 out of 5 stars
REI OUTLET
Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
$64.83 - $69.83
Save 50%
compared to $130.00 - $140.00
8 reviews with an average rating of 3.5 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$150.00
208 reviews with an average rating of 4.4 out of 5 stars
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
$119.00
10 reviews with an average rating of 4.4 out of 5 stars
Free CountryCloud Knit Crewneck Base Layer Top - Men's
$26.73
Save 33%
compared to $40.00
10 reviews with an average rating of 4.0 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$120.00
81 reviews with an average rating of 4.6 out of 5 stars
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Men's
$150.00
32 reviews with an average rating of 4.3 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$92.73 - $96.73
Save 25% - 28%
compared to $130.00
136 reviews with an average rating of 4.4 out of 5 stars
REI OUTLET
New arrival
PatagoniaCapilene Thermal Weight Crewneck Base Layer Top - Men's
$73.73
Save 25%
compared to $99.00
0 reviews
REI OUTLET
Top Rated
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00
44 reviews with an average rating of 4.6 out of 5 stars
New arrival
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$104.73
Save 25%
compared to $140.00
0 reviews
REI OUTLET
Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$120.00
45 reviews with an average rating of 4.8 out of 5 stars
New arrival
SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's
$115.73
Save 25%
compared to $155.00
0 reviews
REI OUTLET
Sale Ends Mar 23
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$67.39
Save 25%
compared to $89.95
15 reviews with an average rating of 4.9 out of 5 stars
Ortovox185 Rock'N'Wool Short Base Layer Pants - Men's
$100.00 - $110.00
0 reviews
Top Rated
Free CountryForce Grid Fleece Base Layer Top - Men's
$29.73
Save 33%
compared to $45.00
17 reviews with an average rating of 4.9 out of 5 stars
REI OUTLET
Mountain HardwearUp First Tech Fleece Base Layer Bottoms - Men's
$74.73
Save 25%
compared to $100.00
3 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
$140.00
72 reviews with an average rating of 4.7 out of 5 stars
SmartwoolIntraknit AS Merino Base Layer Crew Top - Men's
$125.00
0 reviews
New arrival
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$96.73
Save 25%
compared to $130.00
0 reviews
REI OUTLET

31–60 of 121 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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