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Gray Men's Underwear

(60 products)

Products (60)

Sort: Best Match

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, Big
SmartwoolClassic All-Season Merino T-Shirt - Men's
$95.00
94 reviews with an average rating of 4.0 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
63 reviews with an average rating of 4.0 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's
$115.00
15 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SmartwoolIntraknit Thermal Merino Base Layer Hoodie - Men's
$180.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
$119.00
9 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$115.00
34 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
9 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
StioBasis PeakWool Midweight Half-Zip Base Layer Top - Men's
$159.00
5 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
KUHLReactiv Lite Grid Base Layer Bottoms - Men's
$99.00
5 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Icebreaker125 ZoneKnit Crewe Base Layer Top - Men's
$79.93
Save 30%
compared to $115.00
7 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's
$140.00
12 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
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
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00
43 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
SmartwoolThermal Merino Base Layer Hoodie - Men's
$145.00
3 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's
$85.00
4 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
New arrival
NRSH2Core Lightweight Union Suit - Men's
$109.95
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
$130.00 - $140.00
8 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Ortovox185 Rock'N'Wool Short Base Layer Pants - Men's
$100.00 - $110.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's
$80.00
7 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
StioBasis PeakWool Midweight Base Layer Tights - Men's
$149.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
IcebreakerMerino 260 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$185.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Top Rated
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$75.00
17 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's
$120.00 - $130.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$90.00
11 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's
$130.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
$145.00
15 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
StanceTwo Tone Boxer Briefs - Men's
$22.73
Save 24%
compared to $30.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
REI OUTLET
Ortovox120 Comp Light Base Layer Hoody - Men's
$120.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
IcebreakerMerino 260 ZoneKnit Long-Sleeve Crew Base Layer Top- Men's
$175.00
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular, Big

31–60 of 60 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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