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Gray Men's Underwear

(43 products)

Products (43)

Sort: Best Match

Top Rated
Arc'teryxRho Heavyweight Base Layer Bottoms - Men's
$84.83
Save 29%
compared to $120.00
62 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$86.19
Save 25%
compared to $115.00
1505 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$27.89
Save 30%
compared to $39.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Sale Ends May 26
SmartwoolClassic All-Season Merino T-Shirt - Men's
$59.99
Save 25%
compared to $80.00
54 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
$71.19
Save 25%
compared to $95.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
REI Co-opLightweight Base Layer Bottoms - Men's
$27.89
Save 30%
compared to $39.95
6 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Sale Ends May 26
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$67.49
Save 25%
compared to $90.00
56 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$85.00
11 reviews with an average rating of 3.4 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
$135.00
15 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
$130.00
7 reviews with an average rating of 3.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
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
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
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
Underwear Weight:
Ultralightweight
Size Type:
Regular
PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's
$99.00
10 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00
37 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's
$105.00
12 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$31.39
Save 30%
compared to $44.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Sale Ends May 26
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$67.49
Save 25%
compared to $90.00
18 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
REI Co-opLightweight Crew Base Layer Top - Men's
$20.89
Save 30%
compared to $29.95
6 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Sale Ends May 26
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.69
Save 25%
compared to $105.00
122 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$93.69
Save 25%
compared to $125.00
58 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$89.99
Save 25%
compared to $120.00
15 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$71.19
Save 25%
compared to $95.00
28 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$78.69
Save 25%
compared to $105.00
52 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$101.19
Save 25%
compared to $135.00
34 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$86.19
Save 25%
compared to $115.00
17 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 29
Ortovox185 Rock'n'wool Short Base Layer Pants - Men's
$79.99
Save 20%
compared to $100.00
5 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
NRSH2Core Lightweight Union Suit - Men's
$109.95
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$87.99 - $110.00
10 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$56.19
Save 25%
compared to $75.00
6 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Ortovox185 Rock'n'wool Long Base Layer Pants - Men's
$87.99 - $110.00
4 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big

1–30 of 43 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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