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Blue Men's Underwear

(87 products)
Products (87)
Sort: Best Match
    Colors

    REI Co-opMerino Boxers - Men's

    $27.89 - $39.95
    46 reviews with an average rating of 4.3 out of 5 stars
    Size Type:
    Regular, Big
    Colors

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

    $55.89 - $55.93
    Save 30%
    compared to  $79.95
    95 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Colors
    Top Rated

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

    $55.89 - $55.93
    Save 30%
    compared to  $79.95
    139 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Colors

    Arc'teryxMotus SL Boxers - Men's

    $39.73
    Save 20%
    compared to  $50.00
    40 reviews with an average rating of 4.5 out of 5 stars
    Size Type:
    Regular, Big
    REI OUTLET
  • Sale Ends Today
    Colors
    Top Rated

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

    $67.49
    Save 25%
    compared to  $90.00
    588 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    REI Co-opEveryday Boxer Briefs - Men's

    $15.99
    Save 30%
    compared to  $22.95
    138 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors
    Top Rated

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

    $31.39
    Save 30%
    compared to  $44.95
    102 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Colors

    REI Co-opMidweight Base Layer Bottoms - Men's

    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    62 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Today
    Colors
    Top Rated

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

    $41.89
    Save 30%
    compared to  $59.95
    99 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Colors

    SaxxVibe Super Soft Boxer Briefs - Men's

    $25.73
    Save 24%
    compared to  $34.00
    3 reviews with an average rating of 3.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
  • Sale Ends Today
    Colors
    Top Rated

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

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

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

    $27.89
    Save 30%
    compared to  $39.95
    176 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Colors

    PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's

    $53.83 - $109.00
    17 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    Colors

    tasc PerformanceElevation Merino T-Shirt - Men's

    $49.73
    Save 37%
    compared to  $79.00
    30 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Colors

    SaxxVolt Breathable Mesh Boxer Briefs - Men's

    $26.73
    Save 23%
    compared to  $35.00
    3 reviews with an average rating of 4.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    Colors
    Top Rated

    PatagoniaCapilene Midweight Crew Base Layer Top - Men's

    $79.00
    66 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Colors

    Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Hoodie - Men's

    $89.73
    Save 25%
    compared to  $120.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Colors

    Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Men's

    $74.73
    Save 25%
    compared to  $100.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
  • Sale Ends Today
    Colors
    Top Rated

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

    $78.69
    Save 25%
    compared to  $105.00
    55 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    Icebreaker200 Oasis Crewe Base Layer Top - Men's

    $71.19
    Save 25%
    compared to  $95.00
    9 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    SmartwoolIntraknit Active Base Layer Bottoms - Men's

    $82.49
    Save 25%
    compared to  $110.00
    10 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    Icebreaker125 ZoneKnit Base Layer Leggings - Men's

    $93.69
    Save 25%
    compared to  $125.00
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    SmartwoolIntraknit Active Base Layer Top - Men's

    $82.49
    Save 25%
    compared to  $110.00
    13 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

    Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's

    $93.69
    Save 25%
    compared to  $125.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

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

    $48.89
    Save 30%
    compared to  $69.95
    41 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors
    Top Rated

    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's

    $86.19
    Save 25%
    compared to  $115.00
    1453 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Colors

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

    $20.89
    Save 30%
    compared to  $29.95
    92 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Today

    REI Co-opMerino Boxer Briefs - Men's

    $27.89
    Save 30%
    compared to  $39.95
    82 reviews with an average rating of 4.4 out of 5 stars
    Size Type:
    Regular

    StanceInvestor Boxer Briefs - Men's

    $22.73
    Save 24%
    compared to  $30.00
    0 reviews
    Size Type:
    Regular, Big
    REI OUTLET
    Colors

    tasc PerformanceElevation Merino Base Layer Bottoms - Men's

    $49.73
    Save 37%
    compared to  $79.00
    20 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
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