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Underwear

(374 products)
Products (374)
Sort: Best Match
    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
  • 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:
    Big
  • 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
    NikeSwoosh Medium Support Bra
    $28.93 - $42.00
    149 reviews with an average rating of 4.0 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Compression
    Fabric:
    72% polyester/28% spandex
  • 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
    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
  • Sale Ends May 25
    Top Rated
    REI Co-opLightweight Base Layer Tights - Women's
    $33.69
    Save 25%
    compared to  $44.95
    11 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus, Petite
  • Sale Ends May 25
    BrooksConvertible 2.0 Sports Bra
    $41.99 - $45.49
    Save 30%
    compared to  $60.00 - $65.00
    161 reviews with an average rating of 3.9 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
    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
    SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's
    $49.83 - $74.99
    Save 25% - 50%
    compared to  $100.00
    25 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 25
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
    $81.73
    Save 28%
    compared to  $115.00
    280 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
  • 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
    Top Rated
    BrooksChaser Padded Bra
    $45.49
    Save 30%
    compared to  $65.00
    29 reviews with an average rating of 4.6 out of 5 stars
    Bra Support:
    Medium Impact
    Support Style:
    Encapsulation
    Fabric:
    75% nylon/25% spandex
  • 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
    138 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 25
    REI Co-opActive Hipster Underwear - Women's
    $14.89
    Save 25%
    compared to  $19.95
    43 reviews with an average rating of 3.8 out of 5 stars
    Size Type:
    Plus
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's
    $49.83 - $74.99
    Save 25% - 50%
    compared to  $100.00
    102 reviews with an average rating of 4.4 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
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
    $93.69
    Save 25%
    compared to  $125.00
    769 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends May 25
    SmartwoolClassic All-Season Merino T-Shirt - Men's
    $71.19
    Save 25%
    compared to  $95.00
    113 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    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
    ExOfficioEveryday Bralette
    $26.73
    Save 33%
    compared to  $40.00
    99 reviews with an average rating of 4.2 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Compression
    Fabric:
    95% viscose/5% elastane jersey
    REI OUTLET
  • Sale Ends May 25
    Top Rated
    REI Co-opLightweight Crew Base Layer Top - Men's
    $26.19
    Save 25%
    compared to  $34.95
    32 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 25
    Top Rated
    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's
    $97.49
    Save 25%
    compared to  $130.00
    74 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • 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.

    ExOfficioGive-N-Go 2.0 Sport Mesh Thong Underwear - Women's
    $16.73
    Save 30%
    compared to  $24.00
    144 reviews with an average rating of 3.9 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
  • 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 - $33.69
    Save 25% - 51%
    compared to  $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
    REI Co-opMerino 185 Base Layer Top - Women's
    $52.39
    Save 25%
    compared to  $69.95
    67 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    VuoriAllTheForm Bra
    $68.00
    0 reviews
    Bra Support:
    Medium Impact
    Support Style:
    Compression
    Fabric:
    74% polyamide/26% elastane
    PatagoniaMaipo Mid-Impact Bra
    $31.83 - $69.00
    0 reviews
    Bra Support:
    Medium Impact
    Support Style:
    Compression
    Fabric:
    6.3 oz. 81% NetPlus postconsumer recycled nylon/19% spandex knit with miDori bioSoft and HeiQ Mint
1–30 of 374 products
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