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Women's Base Layer Tops

(139 products)
Products (139)
Sort: Best Match
    REI Co-opMidweight Long-Sleeve Base Layer Top - Women's
    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    249 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women's
    $27.89
    Save 30%
    compared to  $39.95
    19 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends Sep 1
    REI Co-opMidweight Base Layer Half-Zip Top - Women's
    $41.89
    Save 30%
    compared to  $59.95
    142 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
    $81.73
    Save 28%
    compared to  $115.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    367 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI OUTLET
  • Sale Ends Sep 1
    REI Co-opLightweight Half-Zip Base Layer Top - Women's
    $31.39
    Save 30%
    compared to  $44.95
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's
    $66.93 - $90.00
    119 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Crew Base Layer Top - Women's
    $20.89
    Save 30%
    compared to  $29.95
    10 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's
    $89.73
    Save 25%
    compared to  $120.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
    $115.00
    1149 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    Kari TraaRose Half-Zip Base Layer Top - Women's
    $59.83 - $140.00
    48 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    SmartwoolClassic All-Season Merino T-Shirt - Women's
    $80.00
    89 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    Arc'teryxLana Merino Wool Crew Base Layer Top - Women's
    $59.93
    Save 33%
    compared to  $90.00
    4 reviews with an average rating of 2.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
    $79.95
    199 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's
    $39.83 - $90.00
    0 reviews
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    REI Co-opMerino 185 Base Layer Top - Women's
    $69.95
    50 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Terramar2.0 Cloud Nine Half-Zip Base Layer Top - Women's
    $34.73
    Save 30%
    compared to  $50.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Kari TraaFryd Base Layer Top - Women's
    $29.83 - $65.00
    22 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Helly HansenLIFA Merino Midweight Crew Base Layer Top - Women's
    $69.73
    Save 30%
    compared to  $100.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI OUTLET
    SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
    $96.73
    Save 25%
    compared to  $130.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    120 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's
    $89.95
    102 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's
    $82.73
    Save 28%
    compared to  $115.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's
    $120.00
    30 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Kari TraaEmbla Wool Base Layer Top - Women's
    $29.83
    Save 50%
    compared to  $60.00
    0 reviews
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    Top Rated
    Black DiamondSolution 150 Merino Base Layer Crew Top - Women's
    $99.73
    Save 26%
    compared to  $135.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    20 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    PatagoniaCapilene Midweight Crew Base Layer Top - Women's
    $59.93 - $89.00
    45 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Kari TraaElse Half-Zip Base Layer Top - Women's
    $76.73
    Save 30%
    compared to  $110.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    3 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    Arc'teryxRho Zip-Neck Base Layer Top - Women's
    $79.93 - $120.00
    11 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    CraftCORE Dry Active Comfort Base Layer Top - Women's
    $39.73
    Save 38%
    compared to  $64.95
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    4 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
    $99.73
    Save 26%
    compared to  $135.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    26 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
    $84.73
    Save 26%
    compared to  $115.00
    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, Plus
    REI OUTLET
1–30 of 139 products
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