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Base Layer Bottoms: Deals

(97 products)
Products (97)
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    REI Co-opMidweight Base Layer Tights - Women's
    $26.83 - $38.39
    Save 30% - 51%
    compared to  $54.95
    93 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus, Petite
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Base Layer Bottoms - Men's
    $27.89
    Save 30%
    compared to  $39.95
    11 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Sep 1
    REI Co-opMidweight Base Layer Bottoms - Men's
    $38.39
    Save 30%
    compared to  $54.95
    77 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big, Tall
    Top Rated
    PatagoniaCapilene Midweight Base Layer Bottoms - Men's
    $59.93 - $89.00
    56 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Base Layer Tights - Women's
    $27.89
    Save 30%
    compared to  $39.95
    7 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    Top Rated
    REI Co-opMidweight Base Layer Bottoms - Kids'
    $23.93 - $34.95
    8 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Arc'teryxRho Base Layer Bottoms - Women's
    $24.83 - $100.00
    17 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
    $81.73
    Save 28%
    compared to  $115.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    247 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Plus, Regular
    REI OUTLET
    tasc PerformanceElevation Merino Base Layer Bottoms - Men's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    31 reviews with an average rating of 3.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    Ortovox185 Rock'n'wool Short Base Layer Pants - Men's
    $49.83
    Save 50%
    compared to  $100.00
    6 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    tasc PerformanceElevation Merino Base Layer Bottoms - Women's
    $49.73
    Save 37%
    compared to  $79.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    53 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Arc'teryxRho Boot Cut Base Layer Bottoms - Women's
    $72.73
    Save 19%
    compared to  $90.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    Kari TraaRose High-Waisted Base Layer Pants - Women's
    $54.83 - $130.00
    14 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Base Layer Bottoms - Infants'/Toddlers'
    $13.89
    Save 30%
    compared to  $19.95
    8 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Kari TraaFryd Base Layer Pants - Women's
    $29.83 - $65.00
    15 reviews with an average rating of 3.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    IcebreakerMerino 200 Oasis Thermal Base Layer Leggings - Women's
    $78.73
    Save 25%
    compared to  $105.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    70 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
    $46.73
    Save 28%
    compared to  $65.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    52 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    Black DiamondSolution 150 Merino Base Layer Bottoms - Women's
    $79.73
    Save 27%
    compared to  $110.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    31 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
  • Sale Ends Sep 1
    Top Rated
    REI Co-opLightweight Base Layer Bottoms - Kids'
    $20.89
    Save 30%
    compared to  $29.95
    9 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    CraftActive Intensity Base Layer Pants - Women's
    $31.73
    Save 42%
    compared to  $54.95
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    13 reviews with an average rating of 2.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
    $92.73
    Save 28%
    compared to  $130.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    27 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    Arc'teryxRho Insulated 3/4 Base Layer Bottoms - Men's
    $159.73
    Save 20%
    compared to  $200.00
    12 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Women's
    $69.73
    Save 30%
    compared to  $100.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    3 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Top Rated
    Arc'teryxRho Heavyweight Base Layer Bottoms - Men's
    $96.73
    Save 19%
    compared to  $120.00
    47 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    REI OUTLET
    PatagoniaCapilene Midweight Base Layer Bottoms - Kids'
    $18.83
    Save 51%
    compared to  $39.00
    5 reviews with an average rating of 2.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    SmartwoolIntraknit Active Base Layer Bottoms - Women's
    $59.83
    Save 45%
    compared to  $110.00
    6 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Arc'teryxRho LT Base Layer Bottoms - Men's
    $79.73
    Save 20%
    compared to  $100.00
    11 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    SmartwoolIntraknit Thermal Max Merino Base Layer Bottoms - Women's
    $100.73
    Save 25%
    compared to  $135.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    0 reviews
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    Arc'teryxKyanite Base Layer Bottoms - Women's
    $96.73
    Save 19%
    compared to  $120.00
    14 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Icebreaker200 Sonebula Leggings - Men's
    $89.73
    Save 25%
    compared to  $120.00
    Members use code LABORDAY2025 for an extra 20% off at REI Outlet
    4 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
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