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Merino Wool Base Layers

(221 products)
Products (221)
Remove features filter:Merino Wool
Sort: Best Match
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
    $135.00
    36 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    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
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Helly HansenGraphic Lifa Merino Base Layer Set - Kids'
    $74.73
    Save 32%
    compared to  $110.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 1.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    REI OUTLET
    Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's
    $80.00
    0 reviews
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    Top Rated
    Icebreaker260 ZoneKnit Base Layer Leggings - Men's
    $119.73
    Save 27%
    compared to  $165.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    9 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Big
    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
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
    $125.00
    4 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    Kari TraaRose Half-Zip Base Layer Top - Women's
    $120.00 - $130.00
    30 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
    $99.73
    Save 26%
    compared to  $135.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    36 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Thermal Base Layer Leggings With Fly - Men's
    $93.73
    Save 25%
    compared to  $125.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    35 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    REI OUTLET
    Icebreaker125 ZoneKnit Base Layer Leggings - Men's
    $125.00
    0 reviews
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular, Big
    Icebreaker200 Oasis 3/4 Base Layer Bottoms - Men's
    $95.00
    10 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Kari TraaAlma Hood 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
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
    $135.00
    25 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Top Rated
    Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
    $115.00
    18 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
    $78.73
    Save 25%
    compared to  $105.00
    Members use code OUT4JUL25 for $20 off $100+ 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
    Kari TraaLucie Base Layer Pants - Women's
    $59.73
    Save 25%
    compared to  $80.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's
    $93.73
    Save 25%
    compared to  $125.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    4 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    IcebreakerMerino 260 Vertex Long-Sleeve Crewe Natural Shades Base Layer Top - Women's
    $104.73
    Save 25%
    compared to  $140.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    2 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    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
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Thermal Base Layer Leggings - Kids'
    $49.73
    Save 28%
    compared to  $70.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    7 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
    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 OUT4JUL25 for $20 off $100+ at REI Outlet
    18 reviews with an average rating of 4.9 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's
    $93.73
    Save 25%
    compared to  $125.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's
    $84.73
    Save 26%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    5 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    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
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Kari TraaAlma 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
    Underwear Weight:
    Ultralightweight
    Size Type:
    Regular
    REI OUTLET
    Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's
    $84.73
    Save 26%
    compared to  $115.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    0 reviews
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
    Kari TraaFloke Base Layer Pants - Women's
    $64.73
    Save 35%
    compared to  $100.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Icebreaker200 Oasis Sonebula Base Layer Leggings - Women's
    $89.73
    Save 25%
    compared to  $120.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 3.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Kari TraaKlara High-Waisted Base Layer Pants - Women's
    $62.73
    Save 30%
    compared to  $90.00
    Members use code OUT4JUL25 for $20 off $100+ at REI Outlet
    1 reviews with an average rating of 3.0 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
151–180 of 221 products
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