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Men's Lightweight Base Layer Tops

(30 products)
Products (30)
Sort: Best Match
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
    $44.83 - $89.95
    133 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
    $53.83 - $100.00
    106 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
    $44.95
    40 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    REI Co-opLightweight Crew Base Layer Top - Men's
    $34.95
    30 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
    $79.95
    228 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI Co-opLightweight Half-Zip Base Layer Top - Men's
    $49.95
    23 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    tasc PerformanceElevation Merino T-Shirt - Men's
    $34.73 - $46.73
    Save 40% - 56%
    compared to  $79.00
    Save up to 30% extra on your REI Outlet purchase
    55 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    REI Co-opMerino 185 Base Layer Top - Men's
    $69.95
    60 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated
    SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
    $66.73
    Save 25%
    compared to  $90.00
    Save up to 30% extra on your REI Outlet purchase
    106 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    SmartwoolClassic All-Season Merino T-Shirt - Men's
    $95.00
    106 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
    $96.93 - $120.00
    87 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
    $77.83 - $130.00
    12 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    Arc'teryxRho LT Crew Neck Base Layer Top - Men's
    $100.00
    45 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Free CountryCloud Knit Crewneck Base Layer Top - Men's
    $26.73
    Save 33%
    compared to  $40.00
    Save up to 30% extra on your REI Outlet purchase
    10 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    Free CountryForce Grid Fleece Base Layer Top - Men's
    $22.73
    Save 49%
    compared to  $45.00
    Save up to 30% extra on your REI Outlet purchase
    17 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big
    REI OUTLET
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    Top Rated
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
    $79.95
    11 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Tall
    Helly HansenLIFA Stripe Crew Base Layer Top - Men's
    $50.00
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
    $89.95
    17 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Tall, Big
    Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's
    $84.73
    Save 26%
    compared to  $115.00
    Save up to 30% extra on your REI Outlet purchase
    7 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
    $64.83 - $69.83
    Save 50%
    compared to  $130.00 - $140.00
    11 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
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    Terms apply
    Top Rated
    IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
    $88.73
    Save 34%
    compared to  $135.00
    Save up to 30% extra on your REI Outlet purchase
    16 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's
    $120.00 - $130.00
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
    $119.00
    12 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    Arc'teryxRho LT Base Layer Hoody - Men's
    $120.00
    97 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big
    New arrival
    Black DiamondCoefficient LT One Piece Base Layer - Men's
    $149.73
    Save 31%
    compared to  $219.00
    Save up to 30% extra on your REI Outlet purchase
    10 reviews with an average rating of 3.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
    $109.00
    11 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Helly HansenHH Durawool Crew Long-Sleeve Base Layer Top - Men's
    $69.73
    Save 26%
    compared to  $95.00
    Save up to 30% extra on your REI Outlet purchase
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Big
    REI OUTLET
    Ortovox120 Comp Light Base Layer Hoody - Men's
    $120.00
    2 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's
    $130.00
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
    $71.83
    Save 50%
    compared to  $145.00
    16 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
Sort: Best Match