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Long Underwear

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Products (403)

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Sale Ends Dec 4
Colors
REI Co-opMidweight Crew Base Layer Top - Kids'
$24.39
Save 30%
compared to $34.95
12 reviews with an average rating of 4.0 out of 5 stars
Sale Ends Dec 4
Colors
REI Co-opMidweight Base Layer Bottoms - Kids'
$24.39
Save 30%
compared to $34.95
9 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Dec 4
Icebreaker125 ZoneKnit Base Layer Leggings - Men's
$93.69
Save 25%
compared to $125.00
2 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Dec 4
Colors
REI Co-opMidweight Base Layer Tights - Women's
$38.39
Save 30%
compared to $54.95
58 reviews with an average rating of 4.1 out of 5 stars
Sale Ends Dec 4
Colors
REI Co-opMidweight Base Layer Half-Zip Top - Women's
$41.89
Save 30%
compared to $59.95
72 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
Icebreaker200 Oasis Crew Top - Men's
$78.69
Save 25%
compared to $105.00
872 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Dec 4
Colors
IcebreakerMerino 260 Vertex Long-Sleeve Half-Zip Herenga Base Layer Top - Women's
$112.49
Save 25%
compared to $150.00
0 reviews
Sale Ends Dec 4
Colors
Top Rated
Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's
$112.49
Save 25%
compared to $150.00
8 reviews with an average rating of 5.0 out of 5 stars
Sale Ends Dec 4
Colors
IcebreakerMerino 200 Sonebula Long-Sleeve Crew Base Layer Top - Women's
$93.69
Save 21%
compared to $120.00
0 reviews
Sale Ends Dec 4
Colors
IcebreakerZoneKnit Merino Explore Long-Sleeve Zip Hoodie - Men's
$299.99
Save 25%
compared to $400.00
0 reviews
Sale Ends Dec 4
Colors
Icebreaker200 Oasis Long-Sleeve Crewe Glacial Flow Base Layer Top - Men's
$86.19
Save 25%
compared to $115.00
0 reviews
Colors
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$38.39 - $54.95
90 reviews with an average rating of 4.4 out of 5 stars
Sale Ends Dec 4
Colors
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's
$93.69
Save 25%
compared to $125.00
0 reviews
Sale Ends Dec 4
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$93.69
Save 25%
compared to $125.00
1 reviews with an average rating of 4.0 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
Icebreaker260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
$101.19
Save 25%
compared to $135.00
95 reviews with an average rating of 4.9 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Top - Kids'
$52.49
Save 25%
compared to $70.00
19 reviews with an average rating of 4.8 out of 5 stars
Colors
REI Co-opMidweight Long-Sleeve Base Layer Top - Women's
$15.83 - $38.39
Save 30% - 71%
compared to $54.95
132 reviews with an average rating of 4.1 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
Icebreaker200 Oasis Long-Sleeve Crewe Ski Tracks Base Layer Top - Women's
$89.99
Save 25%
compared to $120.00
26 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's
$93.69
Save 25%
compared to $125.00
498 reviews with an average rating of 4.9 out of 5 stars
Colors
Top Rated
Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'
$44.99 - $60.00
122 reviews with an average rating of 4.8 out of 5 stars
Sale Ends Dec 4
Colors
REI Co-opMidweight Base Layer Bottoms - Men's
$38.39
Save 30%
compared to $54.95
42 reviews with an average rating of 4.5 out of 5 stars
Sale Ends Dec 4
Top Rated
Icebreaker260 Tech Base Layer Leggings with Fly - Men's
$93.69
Save 25%
compared to $125.00
198 reviews with an average rating of 4.7 out of 5 stars
Sale Ends Dec 4
Colors
Top Rated
REI Co-opMerino Midweight Base Layer Bottoms - Kids'
$34.89
Save 30%
compared to $49.95
8 reviews with an average rating of 4.5 out of 5 stars

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REI Co-opMidweight Crew Base Layer Top - Kids'

REI Co-opMidweight Base Layer Bottoms - Kids'

Icebreaker125 ZoneKnit Base Layer Leggings - Men's

REI Co-opMidweight Base Layer Tights - Women's

REI Co-opMidweight Base Layer Half-Zip Top - Women's

Icebreaker200 Oasis Crew Top - Men's

IcebreakerMerino 260 Vertex Long-Sleeve Half-Zip Herenga Base Layer Top - Women's

Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's

IcebreakerMerino 200 Sonebula Long-Sleeve Crew Base Layer Top - Women's

IcebreakerZoneKnit Merino Explore Long-Sleeve Zip Hoodie - Men's

Icebreaker200 Oasis Long-Sleeve Crewe Glacial Flow Base Layer Top - Men's

REI Co-opMidweight Long-Sleeve Base Layer Top - Men's

Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's

Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's

Icebreaker260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's

IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Top - Kids'

REI Co-opMidweight Long-Sleeve Base Layer Top - Women's

Icebreaker200 Oasis Long-Sleeve Crewe Ski Tracks Base Layer Top - Women's

Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's

Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'

REI Co-opMidweight Base Layer Bottoms - Men's

Icebreaker260 Tech Base Layer Leggings with Fly - Men's

REI Co-opMerino Midweight Base Layer Bottoms - Kids'