Skip to search results
loaded 91 results

Men's Base Layer Tops

(91 products)
Products (91)
Sort: Best Match
    Top Rated
    REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    157 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Sep 1
    Top Rated
    REI Co-opMidweight Base Layer Half-Zip Top - Men's
    $41.89
    Save 30%
    compared to  $59.95
    144 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    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
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
    $27.89
    Save 30%
    compared to  $39.95
    9 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    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
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Crew Base Layer Top - Men's
    $20.89
    Save 30%
    compared to  $29.95
    17 reviews with an average rating of 4.5 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
    $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
    Arc'teryxIonia Merino Wool Base Layer Top - Men's
    $63.93
    Save 28%
    compared to  $90.00
    40 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
    $44.83 - $90.00
    66 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    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
    Arc'teryxIonia Merino Wool Base Layer Hoody - Men's
    $98.93
    Save 29%
    compared to  $140.00
    51 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    SmartwoolClassic All-Season Merino T-Shirt - Men's
    $80.00
    80 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
    $54.83
    Save 50%
    compared to  $110.00
    10 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Half-Zip Base Layer Top - Men's
    $31.39
    Save 30%
    compared to  $44.95
    5 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
    SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
    $95.00
    4 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    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
    $85.73
    Save 25%
    compared to  $115.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    276 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    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
    REI Co-opMerino 185 Base Layer Top - Men's
    $69.95
    54 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Top Rated
    SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
    $89.73
    Save 25%
    compared to  $120.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    20 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
    $66.73
    Save 25%
    compared to  $90.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    66 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    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
    PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's
    $69.93 - $109.00
    18 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    Top Rated
    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
    $120.00
    20 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    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
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
    $78.73
    Save 25%
    compared to  $105.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    64 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    CraftCORE Dry Active Comfort Base Layer Top - Men's
    $39.73
    Save 38%
    compared to  $64.95
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
    $120.00
    27 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Ortovox230 Competition Zip-Neck Base Layer Top - Men's
    $59.83
    Save 50%
    compared to  $120.00
    3 reviews with an average rating of 3.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
1–30 of 91 products
Sort: Best Match

Related Expert Advice articles