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Base Layers: Deals

(217 products)

Products (217)

Sort: Best Match

Arms of Andes300 Lightweight Alpaca Wool 3/4 Base Layer Leggings - Men's
$54.83
Save 50%
compared to $110.00
1 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Kari TraaAnna Long-Sleeve Base Layer Top - Women's
$54.83
Save 50%
compared to $110.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$44.83
Save 50%
compared to $90.00
12 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's
$41.83
Save 50%
compared to $85.00
5 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
StioBasis PeakWool Midweight Base Layer Tights - Men's
$73.83
Save 50%
compared to $149.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes160 Ultralight Alpaca Wool Base Layer Leggings - Men's
$46.83
Save 50%
compared to $95.00
2 reviews with an average rating of 3.0 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women's
$53.83
Save 50%
compared to $109.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
StioBasis PeakWool Midweight Half-Zip Base Layer Top - Men's
$78.83
Save 50%
compared to $159.00
7 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's
$56.83
Save 50%
compared to $115.00
15 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
$71.83
Save 50%
compared to $145.00
16 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Kari TraaLucie Base Layer Pants - Women's
$58.73
Save 26%
compared to $80.00
6 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$81.73 - $84.73
Save 26% - 28%
compared to $115.00
436 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
StioBasisPeak Wool Midweight Half-Zip Base Layer Top - Women's
$73.83
Save 50%
compared to $149.00
3 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Helly HansenLIFA Merino Midweight Graphic Crew Base Layer - Women's
$79.73
Save 27%
compared to $110.00
4 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
New arrival
SmartwoolIntraknit Thermal Merino Base Layer 3/4 Bottoms - Men's
$89.73
Save 25%
compared to $120.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's
$47.73
Save 36%
compared to $75.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Big
REI OUTLET
Arc'teryxRho Base Layer Bottoms - Women's
$79.73
Save 20%
compared to $100.00
15 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Hot ChillysOriginals Print Base Layer Crew - Kids'
$39.73
Save 27%
compared to $55.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
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
Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
$48.73
Save 25%
compared to $65.00
47 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's
$49.83
Save 50%
compared to $100.00
11 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular
PatagoniaCapilene Thermal Weight Boot-Length Long Underwear Bottoms - Women's
$39.83
Save 53%
compared to $85.00
7 reviews with an average rating of 3.4 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
$66.73
Save 25%
compared to $90.00
104 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Helly HansenGraphic Lifa Merino Base Layer Set - Kids'
$93.73
Save 25%
compared to $125.00
1 reviews with an average rating of 1.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Thermal Leggings - Women's
$51.83 - $120.00
88 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
StioBasisPeak Wool Midweight Base Layer Tights - Women's
$73.83
Save 50%
compared to $149.00
5 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
$47.93 - $65.00
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
Top Rated
IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$99.73
Save 26%
compared to $135.00
16 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
REI OUTLET
Kari TraaSval Base Layer Pants - Women's
$49.73
Save 28%
compared to $70.00
2 reviews with an average rating of 3.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET

91–120 of 217 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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