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Underwear

(399 products)
Products (399)
Sort: Best Match
  • Sale Ends May 25
    REI Co-opMerino Boxer Briefs - Men's
    $29.89
    Save 25%
    compared to  $39.95
    116 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular
  • Sale Ends May 25
    REI Co-opMerino Hipster Underwear - Women's
    $22.39
    Save 25%
    compared to  $29.95
    59 reviews with an average rating of 3.9 out of 5 stars
    Size Type:
    Plus
    SaxxQuest Quick-Dry Boxer Briefs - Men's
    $34.00
    13 reviews with an average rating of 4.5 out of 5 stars
    Size Type:
    Regular, Big
    ExOfficioGNG 2.0 Hipster Briefs - Women's
    $16.73
    Save 30%
    compared to  $24.00
    424 reviews with an average rating of 3.9 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
  • Sale Ends May 25
    REI Co-opEveryday Boxers - Men's
    $18.69
    Save 25%
    compared to  $24.95
    140 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Big
  • Sale Ends May 25
    REI Co-opMidweight Base Layer Tights - Women's
    $41.19
    Save 25%
    compared to  $54.95
    126 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus, Petite
  • Sale Ends May 25
    Top Rated
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
    $74.99
    Save 25%
    compared to  $100.00
    106 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 25
    REI Co-opEveryday Boxer Briefs - Men's
    $18.69
    Save 25%
    compared to  $24.95
    163 reviews with an average rating of 4.1 out of 5 stars
    Size Type:
    Big
  • Sale Ends May 25
    REI Co-opMerino Boxers - Men's
    $29.89
    Save 25%
    compared to  $39.95
    82 reviews with an average rating of 4.3 out of 5 stars
    Size Type:
    Regular, Big
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's
    $49.83 - $74.99
    Save 25% - 50%
    compared to  $100.00
    100 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 25
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women's
    $33.69
    Save 25%
    compared to  $44.95
    38 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 25
    BrooksConvertible 2.0 Sports Bra
    $41.99 - $45.49
    Save 30%
    compared to  $60.00 - $65.00
    159 reviews with an average rating of 3.8 out of 5 stars
    Bra Support:
    High Impact
    Support Style:
    Compression
    Fabric:
    Shell 1: 79% recycled polyester/21% spandex; shell 2: 78% recycled polyester/22% spandex
  • Sale Ends May 25
    SmartwoolMerino Boxer Briefs - Boxed - Men's
    $37.49
    Save 25%
    compared to  $50.00
    1 reviews with an average rating of 3.0 out of 5 stars
    Size Type:
    Regular, Big
  • Sale Ends May 25
    REI Co-opActive Bralette 2.0
    $26.89
    Save 25%
    compared to  $35.95
    132 reviews with an average rating of 4.3 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Encapsulation
    Fabric:
    86% polyester/14% spandex mesh
  • Sale Ends May 25
    Top Rated
    Beyond YogaSpacedye Lift Your Spirits Bra
    $50.99
    Save 25%
    compared to  $68.00
    851 reviews with an average rating of 4.7 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Encapsulation
    Fabric:
    87% polyester/13% spandex
  • Sale Ends May 25
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
    $59.89
    Save 25%
    compared to  $79.95
    246 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI Co-opActive Pursuits Crop Tank Top - Women's
    $21.83 - $44.95
    13 reviews with an average rating of 3.9 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Compression
    Fabric:
    86% recycled polyester/14% spandex (bluesign approved)
  • Sale Ends May 25
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
    $67.39
    Save 25%
    compared to  $89.95
    137 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 25
    Top Rated
    BrooksChaser Padded Bra
    $45.49
    Save 30%
    compared to  $65.00
    27 reviews with an average rating of 4.6 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Encapsulation
    Fabric:
    75% nylon/25% spandex
    Top Rated
    VuoriAllTheFeels Bra
    $58.00
    10 reviews with an average rating of 4.8 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Compression
    Fabric:
    75% recycled polyamide/25% elastane
  • Sale Ends May 25
    Top Rated
    REI Co-opLightweight Half-Zip Base Layer Top - Women's
    $37.39
    Save 25%
    compared to  $49.95
    16 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    VuoriYosemite Bra
    $58.00
    29 reviews with an average rating of 4.5 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Compression
    Fabric:
    72% polyester/28% elastane
  • Sale Ends May 25
    Top Rated
    REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
    $41.19
    Save 25%
    compared to  $54.95
    212 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Panache SportEndurance Wired Sports Bra
    $57.93 - $88.00
    14 reviews with an average rating of 4.4 out of 5 stars
    Bra Support:
    High Impact
    Support Style:
    Encapsulation
    Fabric:
    49% polyamide/29% polyester/19% LYCRA Adaptiv/2% TACTEL/1% elastane
  • Limited time only! The R E I Co-op Mastercard.

    Get $130 in value

    When approved for the REI Co-op Mastercard by May 25, you’ll get $30 in card rewards. Plus, you can earn a $100 REI gift card after your first non-REI purchase within 60 days from account opening. Terms apply.

  • Sale Ends May 25
    REI Co-opMidweight Base Layer Half-Zip Top - Women's
    $44.89
    Save 25%
    compared to  $59.95
    195 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends May 25
    REI Co-opMidweight Long-Sleeve Base Layer Top - Women's
    $41.19
    Save 25%
    compared to  $54.95
    324 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends May 25
    JanjiGroundwork Long Bra
    $53.99 - $59.99
    Save 25%
    compared to  $72.00 - $80.00
    20 reviews with an average rating of 4.0 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Compression / Encapsulation
    Fabric:
    68% nylon/32% spandex
    SaxxVolt Breathable Mesh Boxer Briefs - Men's
    $26.73
    Save 23%
    compared to  $35.00
    12 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
    $49.83 - $93.69
    Save 25% - 60%
    compared to  $125.00
    1540 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opMidweight Base Layer Crew Top - Kids'
    $25.93
    Save 25%
    compared to  $34.95
    8 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
1–30 of 399 products
Sort: Best Match

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