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Long Underwear

(397 products)

Products (397)

Sort: Best Match

REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Women's Plus Sizes
$9.83
Save 75%
compared to $39.95
29 reviews with an average rating of 4.5 out of 5 stars
IcebreakerMerino 200 Oasis Base Layer Leggings - Kids'
$41.93
Save 30%
compared to $60.00
6 reviews with an average rating of 3.8 out of 5 stars
Top Rated
Wild RyeEvie Raglan Base Layer Top - Women's
$99.93
Save 20%
compared to $125.00
11 reviews with an average rating of 4.7 out of 5 stars
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
Top Rated
Nani SwimwearUinta Base Layer Bottoms - Women's
$51.93
Save 30%
compared to $75.00
5 reviews with an average rating of 5.0 out of 5 stars
Picture Organic ClothingNangha Base Layer Top - Men's
$44.83
Save 50%
compared to $90.00
0 reviews
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

391–397 of 397 products

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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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