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Base Layers

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Products (464)

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Sale Ends Nov 25
SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
$86.19
Save 25%
compared to $115.00
701 reviews with an average rating of 4.5 out of 5 stars
Sale Ends Nov 25
Top Rated
Classic Thermal Merino Crew Base Layer Top - Men's
$86.19
Save 25%
compared to $115.00
1449 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Nov 25
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$86.19
Save 25%
compared to $115.00
1096 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Nov 25
Top Rated
SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's
$86.19
Save 25%
compared to $115.00
572 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Nov 25
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$89.99
Save 25%
compared to $120.00
3 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Nov 25
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$67.49
Save 25%
compared to $90.00
36 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Nov 25
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's
$89.99
Save 25%
compared to $120.00
5 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Nov 25
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
$55.89
Save 30%
compared to $79.95
174 reviews with an average rating of 4.5 out of 5 stars
Sale Ends Nov 25
REI Co-opMerino 185 Base Layer Bottoms - Men's
$55.89
Save 30%
compared to $79.95
102 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Nov 25
REI Co-opMidweight Base Layer Half-Zip Top - Women's
$41.89
Save 30%
compared to $59.95
112 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Nov 25
REI Co-opMerino 185 Base Layer Bottoms - Women's
$55.89
Save 30%
compared to $79.95
93 reviews with an average rating of 4.3 out of 5 stars
Sale Ends Nov 25
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$69.89
Save 30%
compared to $99.95
2 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Nov 25
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$38.39
Save 30%
compared to $54.95
122 reviews with an average rating of 4.5 out of 5 stars
Sale Ends Nov 25
Top Rated
REI Co-opHeavyweight Merino Base Layer Bottoms - Women's
$69.89
Save 30%
compared to $99.95
5 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Nov 25
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$41.89
Save 30%
compared to $59.95
113 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Nov 25
REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
$69.89
Save 30%
compared to $99.95
3 reviews with an average rating of 4.3 out of 5 stars
Sale Ends Nov 25
REI Co-opMidweight Base Layer Tights - Women's
$38.39
Save 30%
compared to $54.95
75 reviews with an average rating of 4.0 out of 5 stars
Sale Ends Today
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$74.73
Save 42%
compared to $130.00
3 reviews with an average rating of 2.0 out of 5 stars
REI OUTLET
Sale Ends Today
CraftCore Dry Base-Layer Set - Women's
$43.73
Save 41%
compared to $74.95
11 reviews with an average rating of 3.5 out of 5 stars
REI OUTLET
Sale Ends Nov 25
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's
$69.89
Save 30%
compared to $99.95
3 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Nov 25
REI Co-opMidweight Base Layer Bottoms - Kids'
$24.39
Save 30%
compared to $34.95
0 reviews
Sale Ends Nov 25
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$67.49
Save 25%
compared to $90.00
9 reviews with an average rating of 3.9 out of 5 stars
Sale Ends Nov 25
Top Rated
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women's
$73.39
Save 30%
compared to $104.95
6 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Today
SmartwoolIntraknit Thermal Merino Quarter-Zip Base Layer Top - Women's
$69.73
Save 50%
compared to $140.00
7 reviews with an average rating of 3.6 out of 5 stars
REI OUTLET
Sale Ends Nov 25
REI Co-opMidweight Base Layer Crew Top - Kids'
$24.39
Save 30%
compared to $34.95
1 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Nov 25
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.69
Save 25%
compared to $105.00
59 reviews with an average rating of 4.6 out of 5 stars
Sale Ends Nov 25
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$73.39
Save 30%
compared to $104.95
6 reviews with an average rating of 3.8 out of 5 stars
Sale Ends Nov 25
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$62.89
Save 30%
compared to $89.95
92 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Nov 25
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$97.49
Save 25%
compared to $130.00
13 reviews with an average rating of 4.2 out of 5 stars
Sale Ends Nov 25
REI Co-opMerino 185 Base Layer Top - Women's
$48.89
Save 30%
compared to $69.95
30 reviews with an average rating of 4.4 out of 5 stars

1–30 of 464 products

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