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Wool Underwear

(264 products)

Products (264)

Sort: Best Match

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
SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's
$96.73
Save 25%
compared to $130.00
50 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaRose High-Waisted Base Layer Pants - Women's
$120.00 - $130.00
25 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
IcebreakerSiren Sweetheart Long Underwear Top - Women's
$85.00
30 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
Black DiamondSolution 150 Merino Base Layer Crew Top - Women's
$99.73
Save 26%
compared to $135.00
22 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's
$96.73
Save 25%
compared to $130.00
15 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
IcebreakerMerino 200 Oasis Base Layer Leggings - Women's
$125.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's
$84.73
Save 26%
compared to $115.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
SENIQWool Sculpt Merino Mock-Neck Long-Sleeve Base Layer Shirt - Women's
$128.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Women's
$130.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's
$86.73
Save 27%
compared to $120.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's
$75.00
28 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's
$85.00 - $100.00
11 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's
$57.73
Save 47%
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
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
Top Rated
HalfdaysHallie Midweight Merino Base Layer Leggings - Women's
$130.00
28 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Kari TraaSmekker High-Waist Base Layer Pants - Women's
$130.00
0 reviews
Underwear Weight:
Midweight
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
Kari TraaRose Light Capri Base Layer Pants - Women's
$74.73
Save 25%
compared to $100.00
2 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
ArtilectFlatiron 185 Base Layer Leggings - Women's
$76.73
Save 52%
compared to $160.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's
$110.00
3 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Kari TraaKaia Base Layer Set - Women's
$130.00
1 reviews with an average rating of 2.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
SmartwoolMerino Blend Bralette
$70.00
1 reviews with an average rating of 3.0 out of 5 stars
Bra Support:
Low Impact
Support Style:
Encapsulation
Fabric:
37% merino wool/37% TENCEL lyocell/13% nylon/12% elastane/1% polyester
Ortovox120 Comp Light Short Base Layer Pants - Men's
$70.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's
$65.73
Save 45%
compared to $120.00
1 reviews with an average rating of 1.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Racerback Bra
$65.00
1 reviews with an average rating of 1.0 out of 5 stars
Bra Support:
Low Impact
Support Style:
Compression
Fabric:
62% nylon/28% elastane/10% polyester
Top Rated
Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'
$60.00
9 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
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
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
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

121–150 of 264 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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