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Underwear: Deals

(375 products)

Products (375)

Sort: Best Match

Top Rated
Nani SwimwearUinta Base Layer Top - Women's
$55.93
Save 30%
compared to $80.00
10 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Picture Organic ClothingNangha Base Layer Top - Men's
$44.83
Save 50%
compared to $90.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arc'teryxRho LT Base Layer Bottoms - Men's
$80.93 - $100.00
45 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$97.93 - $140.00
9 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's
$81.93 - $110.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes
$34.83 - $69.95
17 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$83.93 - $120.00
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular, Big
REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes
$55.93 - $79.95
8 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes
$55.93 - $79.95
25 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes
$62.93 - $89.95
16 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
REI Co-opLightweight Base Layer Tights - Women's Plus Sizes
$9.83
Save 75%
compared to $39.95
11 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Top Rated
REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Women's Plus Sizes
$9.83
Save 75%
compared to $39.95
28 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
REI Co-opLightweight Base Layer Crew Top - Women's Plus Sizes
$9.83
Save 67%
compared to $29.95
9 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
REI Co-opLightweight Base Layer Crew Top - Women's
$9.83
Save 67%
compared to $29.95
50 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI Co-opLightweight Base Layer Half-Zip Top - Women's Plus Sizes
$9.83
Save 78%
compared to $44.95
7 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus

361–375 of 375 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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