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REI Co-op Underwear

(68 products)
Products (68)
Remove brand filter:REI Co-op
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  • Sale Ends Nov 25
    Top Rated

    REI Co-opMidweight Base Layer Bottoms - Toddlers'

    $17.39
    Save 30%
    compared to  $24.95
    7 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMidweight Crew Base Layer Top - Toddlers'

    $17.39
    Save 30%
    compared to  $24.95
    14 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opLightweight Base Layer Bottoms - Kids'

    $20.89
    Save 30%
    compared to  $29.95
    9 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opLightweight Base Layer Crew Top - Kids'

    $20.89
    Save 30%
    compared to  $29.95
    10 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes

    $55.89
    Save 30%
    compared to  $79.95
    8 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Tall, Big
  • Sale Ends Nov 25

    REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes

    $55.89
    Save 30%
    compared to  $79.95
    13 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Tall, Big
  • Sale Ends Nov 25
    Top Rated

    REI Co-opLightweight Base Layer Bottoms - Infants'/Toddlers'

    $13.89
    Save 30%
    compared to  $19.95
    6 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opLightweight Crew Base Layer Top - Infants'/Toddlers'

    $13.89
    Save 30%
    compared to  $19.95
    8 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular

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

    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    204 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

    REI Co-opMidweight Base Layer Zip-Neck Top - Kids'

    $27.89
    Save 30%
    compared to  $39.95
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes

    $62.89
    Save 30%
    compared to  $89.95
    12 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Tall, Big
  • Sale Ends Nov 25

    REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes

    $55.89
    Save 30%
    compared to  $79.95
    7 reviews with an average rating of 3.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends Nov 25

    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes

    $62.89
    Save 30%
    compared to  $89.95
    15 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends Nov 25

    REI Co-opMerino Thong Underwear - Women's

    $17.39
    Save 30%
    compared to  $24.95
    28 reviews with an average rating of 4.1 out of 5 stars
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

    REI Co-opMerino 185 Base Layer Top - Men's

    $48.89
    Save 30%
    compared to  $69.95
    48 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    REI Co-opEveryday Boxers - Men's

    $15.99
    Save 30%
    compared to  $22.95
    115 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    REI Co-opActive Bralette 2.0

    $24.39
    Save 30%
    compared to  $34.95
    101 reviews with an average rating of 4.2 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Encapsulation
    Fabric:
    86% polyester/14% spandex mesh
    Top Rated

    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes

    $23.83 - $55.89
    Save 30% - 70%
    compared to  $79.95
    25 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus

    REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes

    $34.83 - $48.89
    Save 30% - 50%
    compared to  $69.95
    15 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMerino Bralette

    $31.39
    Save 30%
    compared to  $44.95
    142 reviews with an average rating of 4.6 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Encapsulation
    Fabric:
    48% merino wool/32% TENCEL lyocell/15% nylon/5% LYCRA spandex
  • Sale Ends Nov 25

    REI Co-opActive Briefs - Women's

    $12.49
    Save 30%
    compared to  $17.95
    34 reviews with an average rating of 4.3 out of 5 stars
    Size Type:
    Regular
  • Sale Ends Nov 25

    REI Co-opMerino Bikini Underwear - Women's

    $19.49
    Save 30%
    compared to  $27.95
    41 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular

    REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Women's

    $27.93
    Save 30%
    compared to  $39.95
    175 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular

    REI Co-opActive Pursuits Sports Bra

    $14.83
    Save 70%
    compared to  $49.95
    57 reviews with an average rating of 3.8 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Compression / Encapsulation
    Fabric:
    86% recycled polyester/14% spandex (bluesign approved)

    REI Co-opLightweight Base Layer Bottoms - Men's

    $27.93
    Save 30%
    compared to  $39.95
    77 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated

    REI Co-opMidweight Base Layer Bottoms - Kids'

    $9.83
    Save 71%
    compared to  $34.95
    15 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular

    REI Co-opLightweight Base Layer Crew Top - Women's Plus Sizes

    $19.93
    Save 33%
    compared to  $29.95
    9 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
    Top Rated

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

    $29.93
    Save 33%
    compared to  $44.95
    79 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular

    REI Co-opLightweight Base Layer Tights - Women's

    $27.93
    Save 30%
    compared to  $39.95
    57 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated

    REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's

    $27.93
    Save 30%
    compared to  $39.95
    183 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
31–60 of 68 products
Sort: Best Match

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