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Merino Wool Underwear

(225 products)

Products (225)

Sort: Best Match

Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's
$98.83
Save 29%
compared to $140.00
10 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Women's
$34.73
Save 30%
compared to $50.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$110.00
10 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.73
Save 25%
compared to $105.00
60 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
REI OUTLET
Top Rated
REI Co-opMerino Midweight Base Layer Bottoms - Kids'
$49.95
15 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Ortovox230 Competition Zip-Neck Base Layer Top - Men's
$120.00
3 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Icebreaker200 Sonebula Leggings - Men's
$89.73
Save 25%
compared to $120.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
$99.73
Save 26%
compared to $135.00
24 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
$96.73
Save 25%
compared to $130.00
119 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaLucie Half-Zip Base Layer Top - Women's
$67.73
Save 24%
compared to $90.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Kari TraaKlara High-Waist Base Layer Pant - Women's
$44.83
Save 50%
compared to $90.00
10 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
$115.00
16 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Kari TraaMina Long-Sleeve Base Layer Top - Women's
$44.73
Save 25%
compared to $60.00
1 reviews with an average rating of 4.0 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
48 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73
Save 30%
compared to $130.00
2 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
REI OUTLET
SmartwoolIntraknit Active Base Layer Crew Shirt - Men's
$81.73
Save 25%
compared to $110.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big, Regular
REI OUTLET
Helly HansenMerino Wool Base Layer Set - Kids'
$75.73
Save 36%
compared to $120.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Arc'teryxLana Merino Wool Crew Base Layer Top - Women's
$90.00
5 reviews with an average rating of 2.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
SmartwoolIntraknit Racerback Bra
$48.73
Save 25%
compared to $65.00
8 reviews with an average rating of 3.5 out of 5 stars
Bra Support:
Low Impact
Support Style:
Compression
Fabric:
62% nylon/28% elastane/10% polyester (exclusive of decoration)
REI OUTLET
Kari TraaLucie Base Layer Pants - Women's
$59.73
Save 25%
compared to $80.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Thermal Max Merino Base Layer Pattern Hoodie - Women's
$123.73
Save 25%
compared to $165.00
0 reviews
Size Type:
Regular
REI OUTLET
IcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Men's
$93.73
Save 25%
compared to $125.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Base Layer Crew Top - Kids'
$41.93 - $60.00
8 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Ortovox185 Rock'n'wool Long Base Layer Pants - Men's
$110.00
4 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big
Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's
$100.00
3 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$125.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
IcebreakerMerino 200 Oasis Thermal Base Layer Leggings - Women's
$78.73
Save 25%
compared to $105.00
66 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
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
Ortovox120 Comp Light Base Layer Hoody - Men's
$120.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Arc'teryxLana Merino Wool Base Layer Tank Top - Women's
$90.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus

91–120 of 225 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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