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Hiking Underwear Mens

(188 products)

Products (188)

Sort: Best Match

PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's
$109.00
18 reviews with an average rating of 4.0 out of 5 stars
Icebreaker200 Sonebula Leggings - Men's
$89.73
Save 25%
compared to $120.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
4 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
StanceBlock It Out Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
0 reviews
REI OUTLET
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$49.83 - $104.95
15 reviews with an average rating of 3.9 out of 5 stars
Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$140.00
11 reviews with an average rating of 4.9 out of 5 stars
Top Rated
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00
30 reviews with an average rating of 4.5 out of 5 stars
Free CountryMicrotech Heat Cocaber Base Layer Top - Men's
$21.73
Save 45%
compared to $40.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
2 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$105.00
53 reviews with an average rating of 4.7 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's
$85.00
2 reviews with an average rating of 5.0 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$85.00
10 reviews with an average rating of 3.6 out of 5 stars
Royal RobbinsReadyDry 7" Boxer Briefs - Men's
$21.73
Save 27%
compared to $30.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
2 reviews with an average rating of 3.0 out of 5 stars
REI OUTLET
StanceInvestor Boxer Briefs - Men's
$22.73
Save 24%
compared to $30.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
3 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$59.83 - $120.00
27 reviews with an average rating of 4.8 out of 5 stars
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$130.00
188 reviews with an average rating of 4.4 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's
$75.00
4 reviews with an average rating of 3.5 out of 5 stars
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$125.00
52 reviews with an average rating of 4.6 out of 5 stars
Top Rated
ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
$109.73
Save 31%
compared to $160.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
7 reviews with an average rating of 4.6 out of 5 stars
REI OUTLET
StanceBarnabe Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
1 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$135.00
34 reviews with an average rating of 4.5 out of 5 stars
Picture Organic ClothingNangha Base Layer Top - Men's
$44.83
Save 50%
compared to $90.00
0 reviews
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
StanceKahala Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
1 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$75.73
Save 41%
compared to $130.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
2 reviews with an average rating of 4.5 out of 5 stars
REI OUTLET
Top Rated
Free CountryForce Grid Fleece Crew Base Layer Top - Men's
$26.73
Save 40%
compared to $45.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
5 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Men's
$130.00
22 reviews with an average rating of 4.2 out of 5 stars
StanceWebbed Boxer Briefs - Men's
$19.73
Save 26%
compared to $27.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
0 reviews
REI OUTLET
StanceBurrows Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
0 reviews
REI OUTLET
StanceRickter Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
1 reviews with an average rating of 4.0 out of 5 stars
REI OUTLET
Top Rated
CotopaxiLiso Base Layer Top - Men's
$44.73
Save 31%
compared to $65.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
37 reviews with an average rating of 4.9 out of 5 stars
REI OUTLET
SmartwoolIntraknit Active Base Layer Crew Shirt - Men's
$81.73
Save 25%
compared to $110.00
Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
1 reviews with an average rating of 4.0 out of 5 stars
REI OUTLET

61–90 of 188 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