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REI Co-op Sun-Protective Fabric Base Layer Bottoms

(18 products)
Products (18)
Remove brand filter:REI Co-opRemove features filter:Sun-Protective FabricClear all
Sort: Best Match
    REI Co-opMerino 185 Base Layer Bottoms - Men's
    $63.69
    Save 25%
    compared to  $84.95
    Sale Ends Nov 23
    Top Rated
    5 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    REI Co-opMerino 185 Base Layer Bottoms - Women's
    $63.69
    Save 25%
    compared to  $84.95
    Sale Ends Nov 23
    Top Rated
    8 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Petite, Regular, Plus
    REI Co-opMidweight Base Layer Bottoms - Men's
    $48.69
    Save 25%
    compared to  $64.95
    Sale Ends Nov 23
    Top Rated
    6 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    REI Co-opLightweight Base Layer Bottoms - Men's
    $29.93 - $33.69
    Save 25% - 33%
    compared to  $44.95
    Top Rated
    32 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    REI Co-opLightweight Base Layer Tights - Women's
    $29.93 - $33.69
    Save 25% - 33%
    compared to  $44.95
    Top Rated
    12 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus, Petite
    REI Co-opMerino 250 Base Layer Bottoms - Men's
    $78.69
    Save 25%
    compared to  $104.95
    Sale Ends Nov 23
    0 reviews
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    REI Co-opMerino 250 High-Rise Base Layer Leggings - Women's
    $78.69
    Save 25%
    compared to  $104.95
    Sale Ends Nov 23
    Top Rated
    6 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    REI Co-opMidweight Base Layer Bottoms - Women's
    $48.69
    Save 25%
    compared to  $64.95
    Sale Ends Nov 23
    Top Rated
    10 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Petite, Regular, Plus
    REI Co-opMerino 250 Base Layer Bottoms - Women's
    $78.69
    Save 25%
    compared to  $104.95
    Sale Ends Nov 23
    0 reviews
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    REI Co-opLightweight Base Layer Bottoms - Kids'
    $22.43
    Save 25%
    compared to  $29.95
    Top Rated
    11 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI Co-opLightweight Base Layer Bottoms - Infants'/Toddlers'
    $14.93
    Save 25%
    compared to  $19.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI Co-opMidweight Base Layer Bottoms - Kids'
    $26.19
    Save 25%
    compared to  $34.95
    Sale Ends Nov 23
    Top Rated
    14 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI Co-opMerino Midweight Base Layer Bottoms - Kids'
    $37.39
    Save 25%
    compared to  $49.95
    Sale Ends Nov 23
    Top Rated
    16 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI Co-opMidweight Base Layer Bottoms - Toddlers'
    $18.69
    Save 25%
    compared to  $24.95
    Sale Ends Nov 23
    Top Rated
    10 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Text reads ‘happening now!’ over an image of the R E I Co-op Mastercard.

    $130 in value

    Get $30 in card rewards when you’re approved by Nov 23. Plus, earn a $100 REI gift card after your first qualifying purchase.

    Terms apply

    REI Co-opMerino 185 Base Layer Bottoms - Men's
    $29.83
    Save 62%
    compared to  $79.95
    175 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big
    REI Co-opMidweight Base Layer Tights - Women's
    $19.83
    Save 63%
    compared to  $54.95
    132 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Plus
    REI Co-opMidweight Base Layer Bottoms - Men's
    $19.83
    Save 63%
    compared to  $54.95
    Top Rated
    109 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Big
    REI Co-opMidweight Base Layer Bottoms - Toddlers'
    $24.95
    New arrival
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
Sort: Best Match
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