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REI Co-op Underwear

(54 products)
Products (54)
Remove brand filter:REI Co-op
Sort: Best Match
  • Sale Ends May 26
    Top Rated
    REI Co-opLightweight Base Layer Tights - Women's
    $27.89
    Save 30%
    compared to  $39.95
    5 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    REI Co-opMerino 185 Base Layer Bottoms - Men's
    $39.83 - $55.89
    Save 30% - 50%
    compared to  $79.95
    124 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 26
    REI Co-opLightweight Half-Zip Base Layer Top - Women's
    $31.39
    Save 30%
    compared to  $44.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 26
    REI Co-opMidweight Base Layer Bottoms - Men's
    $38.39
    Save 30%
    compared to  $54.95
    77 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
    $49.83 - $99.95
    21 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
  • Sale Ends May 26
    Top Rated
    REI Co-opLightweight Base Layer Bottoms - Men's
    $27.89
    Save 30%
    compared to  $39.95
    6 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    REI Co-opActive Hipster Underwear - Women's
    $13.19
    Save 30%
    compared to  $18.95
    35 reviews with an average rating of 3.8 out of 5 stars
    Size Type:
    Plus
    Top Rated
    REI Co-opMidweight Base Layer Half-Zip Top - Men's
    $29.83 - $41.89
    Save 30% - 50%
    compared to  $59.95
    133 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes
    $44.83 - $62.89
    Save 30% - 50%
    compared to  $89.95
    17 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
    REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes
    $39.83 - $55.89
    Save 30% - 50%
    compared to  $79.95
    8 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's
    $44.83 - $62.89
    Save 30% - 50%
    compared to  $89.95
    96 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated
    REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women's
    $49.83 - $73.39
    Save 30% - 52%
    compared to  $104.95
    18 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    REI Co-opMidweight Base Layer Half-Zip Top - Women's
    $29.83 - $41.89
    Save 30% - 50%
    compared to  $59.95
    134 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's
    $49.83 - $73.39
    Save 26% - 50%
    compared to  $99.95
    25 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
    $49.83 - $73.39
    Save 30% - 52%
    compared to  $104.95
    14 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women's
    $27.89
    Save 30%
    compared to  $39.95
    6 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 26
    REI Co-opMidweight Long-Sleeve Base Layer Top - Women's
    $38.39
    Save 30%
    compared to  $54.95
    239 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends May 26
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
    $55.89
    Save 30%
    compared to  $79.95
    194 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends May 26
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
    $55.89
    Save 30%
    compared to  $79.95
    172 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 26
    REI Co-opMerino 185 Base Layer Top - Women's
    $48.89
    Save 30%
    compared to  $69.95
    41 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends May 26
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
    $27.89
    Save 30%
    compared to  $39.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    Top Rated
    REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
    $38.39
    Save 30%
    compared to  $54.95
    150 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    REI Co-opMerino 185 Base Layer Bottoms - Women's
    $55.89
    Save 30%
    compared to  $79.95
    103 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends May 26
    REI Co-opMidweight Base Layer Tights - Women's
    $38.39
    Save 30%
    compared to  $54.95
    89 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus, Petite
  • Sale Ends May 26
    REI Co-opLightweight Crew Base Layer Top - Women's
    $20.89
    Save 30%
    compared to  $29.95
    3 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends May 26
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
    $62.89
    Save 30%
    compared to  $89.95
    103 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends May 26
    REI Co-opLightweight Half-Zip Base Layer Top - Men's
    $31.39
    Save 30%
    compared to  $44.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    REI Co-opLightweight Crew Base Layer Top - Men's
    $20.89
    Save 30%
    compared to  $29.95
    6 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends May 26
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes
    $55.89
    Save 30%
    compared to  $79.95
    26 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends May 26
    Top Rated
    REI Co-opMidweight Base Layer Bottoms - Kids'
    $24.39
    Save 30%
    compared to  $34.95
    8 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
1–30 of 54 products
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