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Long Underwear
(407 products)Products (407)
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Terramar2.0 Cloud Nine Midweight Performance Base Layer Leggings - Women's
$33.73Save 25%compared to  $45.00REI OUTLETIcebreakerMerino 260 Vertex Long-Sleeve Crewe Glacial Flow Base Layer Top - Women's
$104.73Save 25%compared to  $140.00REI OUTLETKari TraaKlara High-Waisted Base Layer Pants - Women's
$62.73Save 30%compared to  $90.00REI OUTLETHelly HansenLifa Active Base Layer Bottoms - Women's
$39.73Save 27%compared to  $55.00REI OUTLETKari TraaLucie Base Layer Pants - Women's
$59.73Save 25%compared to  $80.00REI OUTLETKari TraaFierce Base Layer Pants - Women's
$39.73Save 33%compared to  $60.00REI OUTLETOrtovox185 Rock'N'Wool Short Base Layer Pants - Women's
$69.73Save 30%compared to  $100.00REI OUTLETKari TraaSilja Base Layer Pants - Women's
$89.73Save 25%compared to  $120.00REI OUTLETKari TraaFryd Base Layer Pants - Women's
$37.73 - $41.73Save 30% - 37%compared to  $55.00 - $60.00REI OUTLETSmartwoolClassic All-Season Merino Base Layer Long-Sleeve Shirt - Women's
$66.73Save 25%compared to  $90.00REI OUTLETSmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73Save 30%compared to  $130.00REI OUTLETFree CountryForce Grid Fleece Base Layer Top - Men's
$29.73Save 33%compared to  $45.00REI OUTLETSmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$82.73Save 28%compared to  $115.00REI OUTLET- Top Rated
REI Co-opLightweight Base Layer Long-Sleeve Crew Top - Men's
$19.83Save 50%compared to  $39.95 Helly HansenH1 Pro Lifa Seamless Half-Zip Base Layer Top - Men's
$112.73Save 24%compared to  $150.00REI OUTLETFree CountryForce Grid Fleece Base Layer Top - Women's
$34.73Save 30%compared to  $50.00REI OUTLETKari TraaSmekker Base Layer Pants - Women's
$89.73Save 25%compared to  $120.00REI OUTLETTerramar3.0 Thermawool Crew Base Layer Top - Women's
$52.73Save 24%compared to  $70.00REI OUTLETSmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$96.73Save 25%compared to  $130.00REI OUTLET- Top Rated
CotopaxiLiso Base Layer Top - Men's
$48.73Save 25%compared to  $65.00REI OUTLET CraftActive Intensity Base Layer Pants - Men's
$36.73Save 33%compared to  $54.95REI OUTLETKari TraaElenore Base Layer Leggings - Women's
$63.73Save 25%compared to  $85.00REI OUTLETFree CountryMicrotech Heat Base Layer Top - Men's
$28.73Save 36%compared to  $45.00REI OUTLETFree CountryForce Grid Fleece Crew Base Layer Top - Men's
$31.73Save 29%compared to  $45.00REI OUTLETHelly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Women's
$74.73Save 25%compared to  $100.00REI OUTLETIcebreakerMerino 250 Vertex Long-Sleeve Half-Zip Thermal Top Sedimentary - Women's
$89.73Save 40%compared to  $150.00REI OUTLETTerramar3.0 Thermawool Half-Zip Base Layer Top - Women's
$56.73Save 24%compared to  $75.00REI OUTLETHelly HansenLifa Merino Midweight Base Layer Set - Kids'
$69.73Save 30%compared to  $100.00REI OUTLETHelly HansenHH Merino Half-Zip Base Layer Top - Women's
$89.73Save 28%compared to  $125.00REI OUTLETKari TraaFryd Long-Sleeve Base Layer Top - Women's
$34.73Save 36%compared to  $55.00REI OUTLET
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