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Long Underwear
(346 products)Products (346)
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Kari TraaMalia Long-Sleeve Base Layer Top - Women's
$52.73Save 24%compared to  $70.00REI OUTLETTerramar2.0 Ultra Merino Turtleneck Base Layer Top - Women's
$52.73Save 29%compared to  $75.00REI OUTLETKari TraaVoss Cashmere Mix Half-Zip Base Layer Top - Women's
$134.73Save 25%compared to  $180.00REI OUTLETHelly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Women's
$74.73Save 25%compared to  $100.00REI OUTLET- Top Rated
Arc'teryxRho Insulated 3/4 Base Layer Bottoms - Men's
$159.73Save 20%compared to  $200.00REI OUTLET IcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Men's
$93.73Save 25%compared to  $125.00REI OUTLETSmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73Save 30%compared to  $130.00REI OUTLETIcebreakerMerino 200 Oasis Thermal Base Layer Leggings - Women's
$78.73Save 25%compared to  $105.00REI OUTLETIcebreaker200 Sonebula Leggings - Men's
$89.73Save 25%compared to  $120.00REI OUTLETIcebreakerMerino 260 Vertex Long-Sleeve Half-Zip Herenga Base Layer Top - Women's
$99.73Save 33%compared to  $150.00REI OUTLET- Top Rated
Icebreaker260 ZoneKnit Base Layer Leggings - Men's
$119.73Save 27%compared to  $165.00REI OUTLET Kari TraaFryd Base Layer Pants - Women's
$32.73 - $44.73Save 25% - 40%compared to  $55.00 - $60.00REI OUTLETArtilectFlatiron 185 Base Layer Leggings - Men's
$109.73Save 31%compared to  $160.00REI OUTLET- Top Rated
SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
$66.73Save 25%compared to  $90.00REI OUTLET CraftCORE Dry Active Comfort Base Layer Top - Men's
$39.73Save 38%compared to  $64.95REI OUTLET- Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$85.73Save 25%compared to  $115.00REI OUTLET SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'
$44.73Save 31%compared to  $65.00REI OUTLET- Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
$84.73Save 26%compared to  $115.00REI OUTLET Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Hoodie - Women's
$89.73Save 25%compared to  $120.00REI OUTLETIcebreakerMerino Base Layer Leggings - Women's
$149.73Save 25%compared to  $200.00REI OUTLETSmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's
$82.73Save 28%compared to  $115.00REI OUTLET- New arrival
Arc'teryxRho Base Layer Bottoms - Women's
$79.73Save 20%compared to  $100.00REI OUTLET tasc PerformanceElevation Merino Base Layer Bottoms - Men's
$49.73 - $54.73Save 30% - 37%compared to  $79.00REI OUTLET- Top Rated
IcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Women's
$93.73Save 25%compared to  $125.00REI OUTLET - New arrival
Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
$112.73Save 19%compared to  $140.00REI OUTLET SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$92.73Save 28%compared to  $130.00REI OUTLETIcebreakerMerino 200 Oasis Long-Sleeve Crewe Macro Forms Base Layer Top - Women's
$85.73Save 25%compared to  $115.00REI OUTLETIcebreaker200 ZoneKnit Thermal Base Layer Leggings - Women's
$109.73Save 26%compared to  $150.00REI OUTLET- Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.73Save 25%compared to  $105.00REI OUTLET - Top Rated
Sweaty BettyHigh-Neck Jacquard Base Layer Top - Women's
$82.73Save 29%compared to  $118.00REI OUTLET
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