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Men's Base Layer Tops

(83 products)
Products (83)
Sort: Best Match
    Top Rated

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

    $78.73
    Save 25%
    compared to  $105.00
    Save up to 30% extra on your REI Outlet purchase
    60 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    CotopaxiLiso Base Layer Top - Men's

    $48.73
    Save 25%
    compared to  $65.00
    37 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET

    ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's

    $89.73
    Save 30%
    compared to  $130.00
    Save up to 30% extra on your REI Outlet purchase
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET

    IcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Men's

    $93.73
    Save 25%
    compared to  $125.00
    2 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET

    SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's

    $90.73
    Save 30%
    compared to  $130.00
    Save up to 30% extra on your REI Outlet purchase
    2 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET

    SmartwoolIntraknit Active Base Layer Crew Shirt - Men's

    $81.73
    Save 25%
    compared to  $110.00
    1 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Big, Regular
    REI OUTLET

    ArtilectFlatiron 185 Crew Base Layer Top - Men's

    $96.73 - $109.73
    Save 30% - 31%
    compared to  $140.00 - $160.00
    0 reviews
    Underwear Weight:
    Midweight
    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
    Save up to 30% extra on your REI Outlet purchase
    6 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

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

    $89.73
    Save 25%
    compared to  $120.00
    Save up to 30% extra on your REI Outlet purchase
    15 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET

    IcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men's

    $119.73
    Save 27%
    compared to  $165.00
    4 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's

    $89.73
    Save 25%
    compared to  $120.00
    Save up to 30% extra on your REI Outlet purchase
    6 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET

    SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's

    $97.73
    Save 24%
    compared to  $130.00
    9 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    Arc'teryxRho LT Base Layer Hoody - Men's

    $96.93
    Save 19%
    compared to  $120.00
    46 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big
    New arrival

    SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's

    $97.73
    Save 24%
    compared to  $130.00
    Save up to 30% extra on your REI Outlet purchase
    11 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's

    $109.73
    Save 31%
    compared to  $160.00
    Save up to 30% extra on your REI Outlet purchase
    7 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET

    Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's

    $86.73
    Save 24%
    compared to  $115.00
    Save up to 30% extra on your REI Outlet purchase
    3 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET

    SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's

    $52.73
    Save 29%
    compared to  $75.00
    Save up to 30% extra on your REI Outlet purchase
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's

    $99.73
    Save 26%
    compared to  $135.00
    10 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated

    Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's

    $84.83
    Save 29%
    compared to  $120.00
    27 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Big, Regular

    SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's

    $64.83
    Save 50%
    compared to  $130.00
    11 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated

    Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's

    $98.83
    Save 29%
    compared to  $140.00
    101 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big

    Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's

    $98.83
    Save 29%
    compared to  $140.00
    10 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big

    Picture Organic ClothingNangha Base Layer Top - Men's

    $44.83
    Save 50%
    compared to  $90.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
61–83 of 83 products
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