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Gray Men's Underwear

(55 products)

Products (55)

Sort: Best Match

Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$39.83 - $79.95
175 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Free FlyElevate Boxer Briefs - Men's
$28.73
Save 24%
compared to $38.00
55 reviews with an average rating of 4.1 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
Top Rated
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$39.95
9 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
REI Co-opLightweight Base Layer Bottoms - Men's
$39.95
11 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
REI Co-opLightweight Crew Base Layer Top - Men's
$29.95
17 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$66.93 - $90.00
66 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SmartwoolClassic All-Season Merino T-Shirt - Men's
$59.93 - $80.00
77 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$69.83 - $115.00
1506 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
PatagoniaCapilene Midweight Crew Base Layer Top - Men's
$59.93 - $89.00
79 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$72.93 - $105.00
134 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$90.00
19 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$44.95
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's
$69.93 - $99.00
61 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$120.00
27 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
StanceTwo Tone Boxer Briefs - Men's
$22.73
Save 24%
compared to $30.00
0 reviews
Size Type:
Regular
REI OUTLET
SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
$70.93 - $95.00
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$120.00
20 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00
40 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Ortovox185 Rock'n'wool Short Base Layer Pants - Men's
$69.93
Save 30%
compared to $100.00
6 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
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
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's
$105.00
84 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$76.93
Save 30%
compared to $110.00
10 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
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
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
$119.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$130.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular, Big
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's
$80.00
5 reviews with an average rating of 3.2 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00
32 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00
58 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
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
Underwear Weight:
Midweight
Size Type:
Regular, Big

1–30 of 55 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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