What are some popular brands for women's base layer tops at REI?

The top brands for women's base layer tops include: Smartwool Kari Traa REI Co-op Icebreaker Helly Hansen Browse our selection of top outdoor gear and apparel brands.

How can I earn a Co-op Member Reward on my women's base layer tops purchase?

REI Co-op Members get 10% back annually on every eligible purchase, including most full-priced women's base layer tops. (10% is typical but not guaranteed.) To earn or redeem rewards, buy a one-time $30 lifetime membership, or sign in as a member. See details about the Co-op Member Reward .

loaded 109 results

Women's Base Layer Tops

(109 products)

Products (109)

Sort: Best Match

Top Rated
$44.95
37 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
$53.83 - $100.00
92 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
Top Rated
$68.83 - $125.00
1221 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Top Rated
$51.83 - $104.95
34 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Top Rated
$71.83 - $130.00
70 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
$54.95
324 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
$77.83 - $150.00
199 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
$79.95
244 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
$59.95
195 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Top Rated
$69.73
Save 26%
compared to $95.00
6 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
$34.95
28 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
Top Rated
$39.83
Save 50%
compared to $79.95
34 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Top Rated
$51.83 - $120.00
180 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Top Rated
$77.83
Save 40%
compared to $130.00
5 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
$95.00
109 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
$69.95
67 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
$49.95
16 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
$49.83 - $99.95
45 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Top Rated
$81.73 - $84.73
Save 26% - 28%
compared to $115.00
439 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
$29.83
Save 57%
compared to $69.95
28 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Earn 15% in total rewards

Get 5% on all REI Co-op purchases plus the 10% Co-op Member Reward you earn on eligible full-price purchases.
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Top Rated
$49.83 - $89.00
52 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
$95.73
Save 20%
compared to $120.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
$46.73
Save 40%
compared to $79.00
94 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
REI OUTLET
$39.83
Save 55%
compared to $89.95
19 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Top Rated
$89.95
112 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
$56.73
Save 29%
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
Top Rated
$89.73
Save 25%
compared to $120.00
70 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
$83.83 - $140.00
7 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
$63.73
Save 35%
compared to $99.00
30 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
$59.83 - $120.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular