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Base Layers

(427 products)
Products (427)
Sort: Best Match
  • Sale Ends Dec 2

    SmartwoolIntraknit Active Base Layer Top - Men's

    $82.49
    Save 25%
    compared to  $110.00
    1 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    Kari TraaFaith Base Layer Pants - Women's

    $82.49
    Save 25%
    compared to  $110.00
    0 reviews
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
  • Sale Ends Dec 2

    SmartwoolIntraknit Thermal Max Merino Base Layer Bottoms - Men's

    $101.19
    Save 25%
    compared to  $135.00
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    Kari TraaSval Long-Sleeve Base Layer Top - Women's

    $59.99
    Save 25%
    compared to  $80.00
    2 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Dec 2

    SmartwoolThermal Merino Base Layer Hoodie - Men's

    $108.69
    Save 25%
    compared to  $145.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 2

    SmartwoolClassic Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's

    $93.69
    Save 25%
    compared to  $125.00
    0 reviews
    Size Type:
    Regular
  • Sale Ends Dec 4

    Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's

    $87.99
    Save 20%
    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 Dec 4

    Ortovox230 Competition Zip-Neck Base Layer Top - Men's

    $95.99
    Save 20%
    compared to  $120.00
    3 reviews with an average rating of 3.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25

    REI Co-opMerino 185 Base Layer Top - Men's

    $48.89
    Save 30%
    compared to  $69.95
    48 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 2

    SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's

    $116.19
    Save 25%
    compared to  $155.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 2

    SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's

    $97.49
    Save 25%
    compared to  $130.00
    181 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Dec 3
    Top Rated

    ColumbiaMidweight Tights 2 - Kids'

    $22.49
    Save 25%
    compared to  $30.00
    42 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    Kari TraaFryd Base Layer Top - Women's

    $44.99
    Save 25%
    compared to  $60.00
    19 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    SmartwoolClassic Thermal Merino Base Layer Hoodie - Kids'

    $56.19
    Save 25%
    compared to  $75.00
    2 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25
    Top Rated

    Kari TraaRose Half-Zip Base Layer Top - Women's

    $89.99
    Save 25%
    compared to  $120.00
    28 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    IcebreakerMerino 260 Vertex Long-Sleeve Half-Zip Herenga Base Layer Top - Women's

    $112.49
    Save 25%
    compared to  $150.00
    6 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
  • Sale Ends Dec 3
    Top Rated

    ColumbiaOmni-Heat Midweight Crew Base Layer Top - Kids'

    $22.49
    Save 25%
    compared to  $30.00
    53 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    Kari TraaSmekker Half-Zip Base Layer Top - Women's

    $97.49
    Save 25%
    compared to  $130.00
    15 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Dec 2

    SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's

    $97.49
    Save 25%
    compared to  $130.00
    9 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Nov 25
    Top Rated

    REI Co-opMerino Base Layer Tank Top - Women's

    $34.89
    Save 30%
    compared to  $49.95
    21 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
  • Sale Ends Nov 25
    Top Rated

    Kari TraaRose High-Waisted Base Layer Pants - Women's

    $82.49
    Save 25%
    compared to  $110.00
    12 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    Icebreaker200 ZoneKnit Leggings - Women's

    $112.49
    Save 25%
    compared to  $150.00
    1 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Top Rated

    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes

    $23.83 - $55.89
    Save 30% - 70%
    compared to  $79.95
    25 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus

    REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes

    $34.83 - $48.89
    Save 30% - 50%
    compared to  $69.95
    15 reviews with an average rating of 4.1 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends Dec 4

    Ortovox185 Rock'n'wool Long Base Layer Pants - Men's

    $87.99
    Save 20%
    compared to  $110.00
    4 reviews with an average rating of 3.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big

    Kari TraaFryd Base Layer Pants - Women's

    $26.83 - $44.99
    Save 25% - 51%
    compared to  $55.00 - $60.00
    12 reviews with an average rating of 3.3 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Dec 2

    SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's

    $67.49
    Save 25%
    compared to  $90.00
    90 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Plus
  • Sale Ends Nov 25

    Icebreaker200 Oasis Base Layer Shorts - Men's

    $56.19
    Save 25%
    compared to  $75.00
    1 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big
  • Sale Ends Nov 25

    SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'

    $48.69
    Save 25%
    compared to  $65.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Nov 25

    SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'

    $48.69
    Save 25%
    compared to  $65.00
    0 reviews
    Underwear Weight:
    Midweight
    Size Type:
    Regular
121–150 of 427 products
Sort: Best Match

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