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Base Layer Bottoms

(141 products)

Products (141)

Sort: Best Match

SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$92.73
Save 28%
compared to $130.00
28 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Helly HansenLifa Merino Midweight Base Layer Pants - Men's
$105.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
StioBasis PeakWool Midweight Base Layer Tights - Men's
$149.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes
$79.95
10 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Hot ChillysOriginals Print Base Layer Pants - Kids'
$39.73
Save 27%
compared to $55.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino Base Layer Leggings - Women's
$149.73
Save 25%
compared to $200.00
3 reviews with an average rating of 4.3 out of 5 stars
Size Type:
Regular
REI OUTLET
Top Rated
HalfdaysHallie Midweight Merino Base Layer Leggings - Women's
$130.00
25 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
SmartwoolIntraknit Thermal Merino Base Layer 3/4 Bottoms - Men's
$120.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox230 Competition Short Base Layer Pants - Men's
$90.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
Terramar2.0 Cloud Nine Midweight Base Layer Capri Pants - Women's
$28.73
Save 28%
compared to $40.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's
$115.00
14 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Joggers - Women's
$51.73
Save 35%
compared to $80.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's
$99.00
16 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
SmartwoolIntraknit Merino 3/4 Base Layer Bottoms - Women's
$120.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
SmartwoolIntraknit Active Base Layer Bottoms - Men's
$81.73
Save 25%
compared to $110.00
4 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big
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
SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Men's
$250.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Pants - Men's
$56.73
Save 29%
compared to $80.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
Helly HansenLifa Merino Midweight Base Layer Pants - Women's
$105.00 - $115.00
5 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
PatagoniaCapilene Thermal Weight Boot-Length Long Underwear Bottoms - Women's
$85.00
6 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Arc'teryxRho Merino Wool Base Layer Bottoms - Men's
$120.00
4 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
PatagoniaCapilene Thermal Weight Long Underwear Bottoms - Women's
$99.00
16 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's Plus Sizes
$115.00 - $120.00
19 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Plus
Terramar3.0 Thermawool Base Layer Tights - Women's
$52.73
Save 24%
compared to $70.00
3 reviews with an average rating of 1.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaEdith Base Layer Pants - Women's
$74.73
Save 25%
compared to $100.00
3 reviews with an average rating of 3.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Kari TraaSmekker Base Layer Pants - Women's
$83.73
Save 30%
compared to $120.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
KUHLReactiv Lite Grid Base Layer Bottoms - Men's
$99.00
5 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's
$85.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Ortovox185 Rock'N'Wool Short Base Layer Pants - Men's
$100.00 - $110.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
Icebreaker200 Sonebula Leggings - Men's
$89.73
Save 25%
compared to $120.00
5 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big
REI OUTLET

61–90 of 141 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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