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Polyester Base Layers

(120 products)

Products (120)

Sort: Best Match

KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
PatagoniaCapilene Midweight Base Layer Bottoms - Kids'
$18.83
Save 51%
compared to $39.00
5 reviews with an average rating of 2.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
ColumbiaOmni-Heat Midweight Crew Base Layer Top - Kids'
$30.00
72 reviews with an average rating of 4.8 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
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
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
Sale Ends Oct 6
Free CountryCloud Knit Base Layer Bottoms - Women's
$26.73
Save 40%
compared to $45.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's
$109.00
14 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
The North FaceSummit Series Pro 120 Crew Base Layer Top - Men's
$90.00
17 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's
$99.00
27 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
Arc'teryxRho Heavyweight Base Layer Bottoms - Men's
$96.73
Save 19%
compared to $120.00
47 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
SaxxRoast Master Midweight Base Layer Bottoms - Men's
$47.73
Save 36%
compared to $75.00
0 reviews
Underwear Weight:
Midweight
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:
Regular, Big
REI OUTLET
SpraywayEffra Hoody Base Layer Top - Women's
$49.73
Save 28%
compared to $69.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
Arc'teryxRho Base Layer Bottoms - Women's
$79.73
Save 20%
compared to $100.00
12 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
REI OUTLET
PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Women's
$99.00
9 reviews with an average rating of 3.2 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
The North FaceSummit Series Pro 120 Base Layer Tights - Men's
$100.00
14 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Hot ChillysPeach Skins Base Layer Bottoms - Kids'
$29.73
Save 33%
compared to $45.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
The North FaceSummit Series Pro 120 Base Layer Tights - Women's
$100.00
14 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Plus
Sale Ends Oct 6
Terramar2.0 Cloud Nine Midweight Performance Thermal Turtleneck - Women's
$26.73
Save 44%
compared to $48.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Joggers - Women's
$51.73
Save 35%
compared to $80.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
KUHLReactiv Lite Grid Base Layer Bottoms - Women's
$99.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
Free CountryMicrotech Heat Cocarber Base Layer Top - Women's
$34.73
Save 30%
compared to $50.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
The North FaceFD Pro 160 Base Layer Crew Top - Women's
$70.00
50 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Helly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's
$42.73
Save 34%
compared to $65.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Terramar2.0 Cloud Nine Midweight Performance Base Layer Scoop Shirt - Women's
$29.73
Save 33%
compared to $45.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
PatagoniaCapilene Thermal Weight 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
BurtonFleece Base Layer Set - Toddlers'
$64.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
SpraywayEffra Crew Base Layer Top - Women's
$36.73
Save 26%
compared to $49.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
REI OUTLET
Top Rated
The North FaceSummit Series Pro 120 Crew Base Layer Top - Women's
$90.00
13 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Ultralightweight
Size Type:
Regular, Plus
TerramarC-Suite Fusion Thermal Pants - Women's
$42.73
Save 34%
compared to $65.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET

61–90 of 120 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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