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Red Men's Underwear

(23 products)
Products (23)
Remove color filter:Red
Sort: Best Match
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
    $29.83 - $89.95
    102 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
    $29.83 - $79.95
    177 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    156 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
    $51.83 - $105.00
    134 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    SaxxKinetic Light-Compression Mesh Boxer Brief
    $28.73
    Save 24%
    compared to  $38.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    PatagoniaCapilene Midweight Crew Base Layer Top - Men's
    $59.93 - $89.00
    79 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
    $120.00
    91 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
    $115.00
    1506 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    tasc PerformanceElevation Merino Base Layer Bottoms - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    31 reviews with an average rating of 3.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    tasc PerformanceElevation Merino T-Shirt - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code LABORDAY2025 for an extra 20% off 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
    PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's
    $69.93 - $99.00
    61 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
    $99.95
    7 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
    $99.95
    23 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    Arc'teryxRho Heavyweight Base Layer Bottoms - Men's
    $96.73
    Save 19%
    compared to  $120.00
    47 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    REI OUTLET
    Arc'teryxRho LT Base Layer Bottoms - Men's
    $100.00
    49 reviews with an average rating of 4.5 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 LABORDAY2025 for an extra 20% off at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
    $104.95
    15 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
    $119.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    IcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men's
    $119.73
    Save 27%
    compared to  $165.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    5 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men's
    $109.73
    Save 26%
    compared to  $150.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    7 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Thermal Base Layer Leggings With Fly - Men's
    $93.73
    Save 25%
    compared to  $125.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    37 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
    $112.73
    Save 19%
    compared to  $140.00
    0 reviews
    Underwear Weight:
    Heavyweight
    Size Type:
    Big
    REI OUTLET
    Top Rated
    ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
    $109.73
    Save 31%
    compared to  $160.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    7 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
Sort: Best Match

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