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Moisture Wicking Underwear

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    Top Rated

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

    $27.93
    Save 30%
    compared to  $39.95
    186 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's

    $86.19
    Save 25%
    compared to  $115.00
    701 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

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

    $69.89
    Save 30%
    compared to  $99.95
    6 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Nov 25
    Top Rated

    SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's

    $86.19
    Save 25%
    compared to  $115.00
    572 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big

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

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

    Classic Thermal Merino Crew Base Layer Top - Men's

    $86.19
    Save 25%
    compared to  $115.00
    1449 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    REI Co-opMidweight Base Layer Tights - Women's

    $38.39
    Save 30%
    compared to  $54.95
    76 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus, Petite
  • Sale Ends Nov 25

    SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's

    $67.49
    Save 25%
    compared to  $90.00
    9 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

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

    $41.89
    Save 30%
    compared to  $59.95
    113 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

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

    $55.89
    Save 30%
    compared to  $79.95
    102 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25
    Top Rated

    Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's

    $93.69
    Save 25%
    compared to  $125.00
    15 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25
    Top Rated

    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's

    $89.99
    Save 25%
    compared to  $120.00
    5 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

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

    $55.89
    Save 30%
    compared to  $79.95
    174 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Nov 25

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

    $55.89
    Save 30%
    compared to  $79.95
    94 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular

    Icebreaker200 Sonebula Leggings - Men's

    $89.73
    Save 25%
    compared to  $120.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMidweight Base Layer Half-Zip Top - Men's

    $41.89
    Save 30%
    compared to  $59.95
    113 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Nov 25

    REI Co-opMerino Boxers - Men's

    $27.89
    Save 30%
    compared to  $39.95
    56 reviews with an average rating of 4.4 out of 5 stars
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's

    $86.19
    Save 25%
    compared to  $115.00
    1098 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25
    Top Rated

    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's

    $78.69
    Save 25%
    compared to  $105.00
    61 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    REI Co-opHeavyweight Merino Base Layer Bottoms - Men's

    $69.89
    Save 30%
    compared to  $99.95
    4 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Nov 25
    Top Rated

    SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's

    $67.49
    Save 25%
    compared to  $90.00
    8 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

    REI Co-opMidweight Base Layer Crew Top - Kids'

    $24.39
    Save 30%
    compared to  $34.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    REI Co-opActive Thong Underwear - Women's

    $10.39
    Save 30%
    compared to  $14.95
    10 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25

    REI Co-opMidweight Base Layer Bottoms - Men's

    $38.39
    Save 30%
    compared to  $54.95
    67 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • 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

    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's

    $89.99
    Save 25%
    compared to  $120.00
    3 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's

    $67.49
    Save 25%
    compared to  $90.00
    36 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25
    Top Rated

    REI Co-opHeavyweight Merino Base Layer Bottoms - Women's

    $69.89
    Save 30%
    compared to  $99.95
    5 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25
    Top Rated

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

    $38.39
    Save 30%
    compared to  $54.95
    121 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Today

    SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's

    $74.73
    Save 42%
    compared to  $130.00
    3 reviews with an average rating of 2.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
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