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Blue Men's Underwear

(81 products)
Products (81)
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    SaxxKinetic Light-Compression Mesh Boxer Brief
    $28.73
    Save 24%
    compared to  $38.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    Size Type:
    Regular
    REI OUTLET
    SaxxVibe Super Soft Boxer Briefs - Men's
    $25.73
    Save 24%
    compared to  $34.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    26 reviews with an average rating of 4.0 out of 5 stars
    Size Type:
    Regular, Big
    REI OUTLET
    StanceButter Blend Boxers - Men's
    $22.73
    Save 24%
    compared to  $30.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    SaxxDropTemp Cooling Mesh Boxer Briefs - Men's
    $26.73
    Save 29%
    compared to  $38.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    41 reviews with an average rating of 3.8 out of 5 stars
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
    $66.93 - $90.00
    64 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    SmartwoolClassic All-Season Merino T-Shirt - Men's
    $59.93 - $80.00
    69 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    SaxxUltra Super Soft Boxer Briefs - Men's
    $25.73
    Save 24%
    compared to  $34.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    3 reviews with an average rating of 4.7 out of 5 stars
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    REI Co-opMidweight Base Layer Half-Zip Top - Men's
    $39.93 - $59.95
    138 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
    $39.95
    7 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    StanceCurren Poly Boxer Briefs - Men's
    $18.73
    Save 25%
    compared to  $25.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
    $85.93 - $115.00
    1506 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
    $70.93 - $95.00
    3 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opLightweight Base Layer Bottoms - Men's
    $39.95
    10 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    REI Co-opLightweight Crew Base Layer Top - Men's
    $29.95
    10 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    SaxxVolt Breathable Mesh Boxer Briefs - Men's
    $26.73
    Save 23%
    compared to  $35.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    5 reviews with an average rating of 3.8 out of 5 stars
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
    $54.95
    154 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    REI Co-opMidweight Base Layer Bottoms - Men's
    $54.95
    77 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    StanceOcean Blue Boxer Briefs - Men's
    $22.73
    Save 24%
    compared to  $30.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 1.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    tasc PerformanceElevation Merino T-Shirt - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    38 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
    $59.83 - $120.00
    90 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    tasc PerformanceElevation Merino Base Layer Bottoms - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    31 reviews with an average rating of 3.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    REI Co-opLightweight Half-Zip Base Layer Top - Men's
    $44.95
    4 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    Arc'teryxRho LT Crew Neck Base Layer Top - Men's
    $59.83 - $100.00
    27 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    StanceCompression Nylon Boxer Briefs - Men's
    $29.73
    Save 23%
    compared to  $39.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    StancePedlz Fallin Boxer Briefs - Men's
    $22.73
    Save 24%
    compared to  $30.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    Size Type:
    Regular
    REI OUTLET
    CraftCore Dry Active Comfort Base Layer Pants - Men's
    $32.73
    Save 34%
    compared to  $49.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 1.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
    $49.83 - $99.95
    22 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
    $66.73
    Save 25%
    compared to  $90.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    64 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    PatagoniaCapilene Midweight Base Layer Bottoms - Men's
    $89.00
    56 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    Arc'teryxIonia Merino Wool Base Layer Top - Men's
    $90.00
    38 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
1–30 of 81 products
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