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Baselayers

(167 products)
Products (167)
Sort: Best Match
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
    $81.73
    Save 28%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    247 reviews with an average rating of 4.4 out of 5 stars
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
    $81.73
    Save 28%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    367 reviews with an average rating of 4.7 out of 5 stars
    REI OUTLET
    tasc PerformanceElevation Merino Base Layer Bottoms - Women's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    53 reviews with an average rating of 4.2 out of 5 stars
    REI OUTLET
    Terramar2.0 Cloud Nine Half-Zip Base Layer Top - Women's
    $34.73
    Save 30%
    compared to  $50.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    CraftActive Intensity Base Layer - Women's
    $36.73
    Save 43%
    compared to  $64.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    3 reviews with an average rating of 3.3 out of 5 stars
    REI OUTLET
    CraftActive Intensity Base Layer Pants - Women's
    $31.73
    Save 42%
    compared to  $54.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    13 reviews with an average rating of 2.9 out of 5 stars
    REI OUTLET
    tasc PerformanceElevation Merino Base Layer Bottoms - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    31 reviews with an average rating of 3.8 out of 5 stars
    REI OUTLET
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'
    $44.73
    Save 31%
    compared to  $65.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    5 reviews with an average rating of 3.6 out of 5 stars
    REI OUTLET
    CraftCore Dry Active Comfort Base Layer Pants - Men's
    $32.73
    Save 34%
    compared to  $49.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 1.0 out of 5 stars
    REI OUTLET
    Arc'teryxRho Boot Cut Base Layer Bottoms - Women's
    $72.73
    Save 19%
    compared to  $90.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    REI OUTLET
    CraftCORE Dry Active Comfort Base Layer Top - Women's
    $39.73
    Save 38%
    compared to  $64.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    3 reviews with an average rating of 3.7 out of 5 stars
    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 OUT4JUL25 for $20 off $100+ at REI Outlet
    64 reviews with an average rating of 4.6 out of 5 stars
    REI OUTLET
    CraftCore Dry Active Comfort Base Layer Pants - Women's
    $29.73
    Save 33%
    compared to  $44.95
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's
    $96.73
    Save 25%
    compared to  $130.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    120 reviews with an average rating of 4.3 out of 5 stars
    REI OUTLET
    IcebreakerMerino 200 Oasis Thermal Base Layer Leggings - Women's
    $78.73
    Save 25%
    compared to  $105.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    68 reviews with an average rating of 4.4 out of 5 stars
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
    $48.73
    Save 25%
    compared to  $65.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    52 reviews with an average rating of 4.7 out of 5 stars
    REI OUTLET
    SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
    $92.73
    Save 28%
    compared to  $130.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    27 reviews with an average rating of 4.3 out of 5 stars
    REI OUTLET
    Arc'teryxRho Base Layer Bottoms - Women's
    $79.73
    Save 20%
    compared to  $100.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    12 reviews with an average rating of 4.0 out of 5 stars
    REI OUTLET
    Helly HansenMerino Wool Base Layer Set - Kids'
    $75.73
    Save 36%
    compared to  $120.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
    $85.73
    Save 25%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    276 reviews with an average rating of 4.7 out of 5 stars
    REI OUTLET
    SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's
    $82.73
    Save 28%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    Kari TraaMalia Long-Sleeve Base Layer Top - Women's
    $52.73
    Save 24%
    compared to  $70.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    Free CountryForce Grid Fleece Base Layer Bottoms - Women's
    $34.73
    Save 36%
    compared to  $55.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    3 reviews with an average rating of 4.7 out of 5 stars
    REI OUTLET
    Free CountryForce Grid Fleece Base Layer Top - Women's
    $34.73
    Save 36%
    compared to  $55.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    REI OUTLET
    Helly HansenLifa Merino Midweight Base Layer Set - Kids'
    $69.73
    Save 30%
    compared to  $100.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    2 reviews with an average rating of 4.0 out of 5 stars
    REI OUTLET
    Terramar3.0 Thermawool Crew Base Layer Top - Women's
    $49.73 - $52.73
    Save 24% - 28%
    compared to  $70.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 3.0 out of 5 stars
    REI OUTLET
    Arc'teryxKyanite Base Layer Bottoms - Women's
    $96.73
    Save 19%
    compared to  $120.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    11 reviews with an average rating of 4.4 out of 5 stars
    REI OUTLET
    Kari TraaMalia Base Layer Pants - Women's
    $52.73
    Save 24%
    compared to  $70.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
    Kari TraaMina Long-Sleeve Base Layer Top - Women's
    $44.73
    Save 25%
    compared to  $60.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    2 reviews with an average rating of 2.5 out of 5 stars
    REI OUTLET
    Kari TraaAlma Half-Zip Base Layer Top - Women's
    $59.73
    Save 25%
    compared to  $80.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    REI OUTLET
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