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Underwear

(515 products)

Products (515)

Sort: Best Match

Ortovox185 Rock'n'wool Short Base Layer Pants - Men's
$100.00
5 reviews with an average rating of 4.2 out of 5 stars
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$125.00
51 reviews with an average rating of 4.6 out of 5 stars
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00
29 reviews with an average rating of 4.5 out of 5 stars
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$85.00
9 reviews with an average rating of 3.9 out of 5 stars
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
EnduraSingleTrack Bike Liner Shorts - Women's
$70.00
0 reviews
PatagoniaMaipo Low-Impact Bra
$59.00
3 reviews with an average rating of 3.3 out of 5 stars
prAnaLuxara Rib Racerback Bralette
$58.00
0 reviews
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$135.00
34 reviews with an average rating of 4.5 out of 5 stars
PYNRSWarren Sports Bra
$65.00
4 reviews with an average rating of 5.0 out of 5 stars
Top Rated
PatagoniaCapilene Midweight Base Layer Bottoms - Men's
$89.00
56 reviews with an average rating of 4.5 out of 5 stars
Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$69.83 - $140.00
10 reviews with an average rating of 4.9 out of 5 stars
SmartwoolClassic All-Season Merino T-Shirt - Women's
$55.93 - $80.00
70 reviews with an average rating of 4.2 out of 5 stars
Arc'teryxLana Merino Wool Base Layer Tank Top - Women's
$90.00
1 reviews with an average rating of 5.0 out of 5 stars
Icebreaker260 Tech High-Rise Base Layer Leggings - Women's
$125.00
13 reviews with an average rating of 4.5 out of 5 stars
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$44.95
1 reviews with an average rating of 5.0 out of 5 stars
REI Co-opMidweight Base Layer Half-Zip Top - Women's
$29.83 - $59.95
134 reviews with an average rating of 4.4 out of 5 stars
prAnaSculpt Deep Breath Bra
$59.00
0 reviews
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$105.00
52 reviews with an average rating of 4.7 out of 5 stars
prAnaSculpt Adjustable Cami
$69.00
0 reviews
OnPerformance Flex Bra
$51.93 - $75.00
4 reviews with an average rating of 5.0 out of 5 stars
Top Rated
RHONERevive Longline Bra
$58.00
8 reviews with an average rating of 4.6 out of 5 stars
Top Rated
REI Co-opLightweight Crew Base Layer Top - Men's
$29.95
5 reviews with an average rating of 4.8 out of 5 stars
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women's
$105.00
120 reviews with an average rating of 4.8 out of 5 stars
Top Rated
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's
$49.83 - $99.95
25 reviews with an average rating of 4.6 out of 5 stars
Top Rated
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women's
$49.83 - $104.95
18 reviews with an average rating of 4.7 out of 5 stars
EnduraSingleTrack Bike Bib Liner Shorts - Men's
$100.00
0 reviews
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$115.00
17 reviews with an average rating of 4.8 out of 5 stars
EnduraSingleTrack Bike Liner Shorts - Men's
$70.00
0 reviews
Top Rated
REI Co-opLightweight Base Layer Bottoms - Men's
$39.95
6 reviews with an average rating of 5.0 out of 5 stars

91–120 of 515 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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