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Men's Base Layers

(116 products)

Products (116)

Sort: Best Match

Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$69.83
Save 41%
compared to $120.00
45 reviews with an average rating of 4.8 out of 5 stars
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$120.00
86 reviews with an average rating of 4.7 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
$89.73
Save 25%
compared to $120.00
61 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$120.00
226 reviews with an average rating of 4.6 out of 5 stars
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$84.73
Save 26%
compared to $115.00
318 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
SmartwoolClassic Thermal Merino Base Layer Hoodie - Men's
$108.73
Save 25%
compared to $145.00
3 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Helly HansenLIFA Stripe Crew Base Layer Top - Men's
$50.00
0 reviews
SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's
$99.93 - $155.00
0 reviews
Top Rated
SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
$66.73
Save 25%
compared to $90.00
106 reviews with an average rating of 4.6 out of 5 stars
REI OUTLET
REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes
$79.95
17 reviews with an average rating of 3.9 out of 5 stars
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's
$99.00
80 reviews with an average rating of 4.4 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Base Layer Bottoms - Men's
$89.00
60 reviews with an average rating of 4.6 out of 5 stars
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00
80 reviews with an average rating of 4.7 out of 5 stars
Top Rated
Arc'teryxRho LT Crew Neck Base Layer Top - Men's
$100.00
45 reviews with an average rating of 4.8 out of 5 stars
Top Rated
ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
$95.73
Save 40%
compared to $160.00
10 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00
48 reviews with an average rating of 4.5 out of 5 stars
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$96.73
Save 25%
compared to $130.00
2 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's
$115.00
87 reviews with an average rating of 4.7 out of 5 stars
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
11 reviews with an average rating of 4.5 out of 5 stars
PatagoniaCapilene Thermal Weight Zip-Neck Base Layer Top - Men's
$69.73
Save 36%
compared to $109.00
26 reviews with an average rating of 3.9 out of 5 stars
REI OUTLET
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
SmartwoolIntraknit Thermal Merino Base Layer Hoodie - Men's
$134.73
Save 25%
compared to $180.00
2 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Mountain HardwearUp First Tech Fleece Base Layer Bottoms - Men's
$74.73
Save 25%
compared to $100.00
4 reviews with an average rating of 4.5 out of 5 stars
REI OUTLET
Top Rated
Arc'teryxRho LT Base Layer Hoody - Men's
$120.00
97 reviews with an average rating of 4.9 out of 5 stars
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
$119.00
12 reviews with an average rating of 4.3 out of 5 stars
SmartwoolClassic All-Season Merino 3/4 Base Layer Bottoms - Men's
$85.00
5 reviews with an average rating of 4.2 out of 5 stars
Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's
$84.73
Save 26%
compared to $115.00
7 reviews with an average rating of 4.4 out of 5 stars
REI OUTLET
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$92.73
Save 28%
compared to $130.00
137 reviews with an average rating of 4.3 out of 5 stars
REI OUTLET
PatagoniaCapilene Thermal Weight Crewneck Base Layer Top - Men's
$73.73
Save 25%
compared to $99.00
12 reviews with an average rating of 4.1 out of 5 stars
REI OUTLET
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95
17 reviews with an average rating of 4.8 out of 5 stars

31–60 of 116 products

Sort: Best Match

Related Expert Advice articles

Which material is best?

Wool: highly moisture-wicking and odor-resistant
Synthetic: durable and less expensive
Silk: soft and lightweight for casual activities

Match the temp to the trek

Lightweight layers: best for moderate to cool temperatures
Midweight layers: best for cold temperatures
Heavyweight layers: best for below-freezing temperatures

Find your fit

Must be close to skin to efficiently wick sweat; should fit comfortably snug
Base layer is for moisture control; your mid layer is for warmth

Read full article: How to Choose Base Layers

Fabrics

Synthetic: moisture-wicking, quick drying, durable, but can hold on to odor
Wool: moisture-wicking, odor-resistant, cooling in warm weather, can be less durable

Styles

Bikini: less rear coverage, thinner waistband, higher-cut leg
Briefs (women's): full-cut briefs offer more coverage in front and back; hipsters offer medium front coverage and back with higher rise
Briefs (men's): close fit and good support, but less thigh coverage
Boxer brief or boy shorts: snug fit, good coverage, longer cut extends down to the upper thigh
Boxers: looser fit, added coverage can prevent chafing but prone to bunching
Thongs: lightweight and quick-drying but provide the least coverage
Sports bras: compression and support during high-output activities like hiking and running

Read full article: How to Choose Hiking Underwear

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