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Underwear
(560 products)Products (560)
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- StanceBurrows Wholester Boxer Briefs - Men's$24.73Save 29%compared to  $35.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- StanceTri Angular Wholester Boxer Briefs - Men's$24.73Save 29%compared to  $35.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- Kari TraaAnna High-Waist Base Layer Pants - Women's$110.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLIFA Merino Midweight 3/4 Base Layer Pants - Men's$85.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 260 Tech Long-Sleeve Turtleneck Base Layer - Men'sTop Rated$135.00Underwear Weight:MidweightSize Type:Big
- StanceOcean Blue Boxer Briefs - Men's$22.73Save 24%compared to  $30.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Crew Base Layer - Women'sNew arrival$79.73Save 27%compared to  $110.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'$65.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaLune Base Layer Pants - Women's$48.73Save 25%compared to  $65.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:HeavyweightSize Type:RegularREI OUTLET
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's$109.00Underwear Weight:LightweightSize Type:Regular, Big
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Bottoms - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- IcebreakerMerino 260 Vertex Natural Shades Base Layer Leggings - Women's$104.73Save 25%compared to  $140.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$110.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLifa Merino Midweight Crew Base Layer Top - Men's$105.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker200 Oasis 3/4 Base Layer Bottoms - Men's$95.00Underwear Weight:MidweightSize Type:Regular
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women's$119.00Underwear Weight:LightweightSize Type:Regular
- Helly HansenHH Durawool Crew Long-Sleeve Base Layer - Women's$90.00Underwear Weight:LightweightSize Type:Regular
- Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's$150.00Underwear Weight:MidweightSize Type:Regular, Plus
- IcebreakerMerino Blend 260 ZoneKnit Seamless Long-Sleeve Crew Base Layer Top - Women's$150.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men'sNew arrival$160.00Underwear Weight:MidweightSize Type:Regular, Big
- Ortovox185 Rock'N'Wool Short Base Layer Pants - Men'sNew arrival$100.00 - $110.00Underwear Weight:LightweightSize Type:Regular, Big
- Kari TraaRose Half-Zip Base Layer Top - Women'sTop Rated$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women's$109.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Base Layer Top - Women's$120.00Underwear Weight:MidweightSize Type:Regular
- Outdoor ResearchAlpine Onset Merino 150 Quarter-Zip Base Layer Top - Men'sNew arrival$109.00Underwear Weight:LightweightSize Type:Regular, Big
- IcebreakerMerino 260 Vertex Glacial Flow Base Layer Leggings - Women's$104.73Save 25%compared to  $140.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men'sNew arrival$99.00Underwear Weight:LightweightSize Type:Regular, Big
- Kari TraaSmekker High-Waist Base Layer Pants - Women'sNew arrival$130.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaSaga Base Layer Pants - Women's$120.00Underwear Weight:HeavyweightSize Type:Regular
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