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Long Sleeve Underwear

(194 products)

Products (194)

Sort: Best Match

Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's
$86.73 - $89.73
Save 25% - 27%
compared to $120.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Vertex Long-Sleeve Crewe Thermal Base Layer Top - Women's
$99.73
Save 28%
compared to $140.00
5 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Top Rated
ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
$109.73
Save 31%
compared to $160.00
7 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's
$52.73
Save 29%
compared to $75.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
$119.73
Save 25%
compared to $160.00
2 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's
$97.73
Save 24%
compared to $130.00
48 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's
$89.73
Save 25%
compared to $120.00
6 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
ArtilectDarkhorse 185 Zoned Quarter-Zip Base Layer Top - Women's
$116.73
Save 31%
compared to $170.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaAlma Half-Zip Base Layer Top - Women's
$59.73
Save 25%
compared to $80.00
0 reviews
Underwear Weight:
Ultralightweight
Size Type:
Regular
REI OUTLET
Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's
$104.73
Save 30%
compared to $150.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Arc'teryxKyanite Base Layer Crew Top - Women's
$72.83
Save 39%
compared to $120.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's
$93.73
Save 25%
compared to $125.00
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Kari TraaSmekker Long-Sleeve Base Layer Top - Women's
$89.73
Save 25%
compared to $120.00
4 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's
$82.73
Save 24%
compared to $110.00
1 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
SpraywayEffra Hoody Base Layer Top - Women's
$49.73
Save 28%
compared to $69.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
SpraywayEffra Crew Base Layer Top - Women's
$36.73
Save 26%
compared to $49.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$99.73
Save 26%
compared to $135.00
10 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
Icebreaker125 ZoneKnit Merino Long-Sleeve Crewe Thermal Top - Men's
$93.73
Save 25%
compared to $125.00
6 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$84.83
Save 29%
compared to $120.00
27 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big, Regular
Top Rated
BurtonMidweight X Base Layer Long Neck Hoodie - Women's
$44.83
Save 50%
compared to $89.95
5 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's
$74.83
Save 50%
compared to $150.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Kari TraaFaith Half-Zip Base Layer Top - Women's
$59.83
Save 50%
compared to $120.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Cloud Dye Base Layer Top - Women's
$56.83
Save 50%
compared to $115.00
13 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
SeirusHeatwave Body Mapped Quarter-Zip Long-Sleeve Base Layer Top - Women's
$69.83
Save 50%
compared to $140.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
$64.83
Save 50%
compared to $130.00
11 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's
$97.93
Save 30%
compared to $140.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
Top Rated
Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
$98.83
Save 29%
compared to $140.00
101 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
BurtonMidweight Base Layer Crew Top - Women's
$31.83
Save 50%
compared to $64.95
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's
$61.83
Save 50%
compared to $125.00
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
HalfdaysJohnson Base Layer Top - Women's
$62.93
Save 25%
compared to $85.00
104 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Plus

151–180 of 194 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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