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Long Sleeve Underwear
(197 products)Products (197)
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- StioBasisPeak Wool Midweight Half-Zip Base Layer Top - Women's$73.83Save 50%compared to  $149.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho SV Zip-Neck Base Layer Top - Men's$140.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Arc'teryxRho Zip-Neck Base Layer Top - Women'sTop Rated$120.00Underwear Weight:LightweightSize Type:Regular, Plus
- Helly HansenLifa Merino Midweight Graphic Base Layer Top - Women'sTop Rated$79.73 - $82.73Save 24% - 27%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men's$250.00Underwear Weight:HeavyweightSize Type:Regular
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$64.83 - $69.83Save 50%compared to  $130.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Big
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's$71.83Save 50%compared to  $145.00Underwear Weight:LightweightSize Type:Regular, Big
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's$56.83 - $66.83Save 50%compared to  $115.00 - $135.00Underwear Weight:LightweightSize Type:Regular
- HalfdaysJohnson Base Layer Top - Women's$65.93Save 30%compared to  $95.00Underwear Weight:UltralightweightSize Type:Regular
- Kari TraaKaia Base Layer Set - Women's$64.83Save 50%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- Black DiamondSolution 150 Merino Base Layer Crew Top - Women'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaSaga Half-Zip Base Layer Top - Women's$66.83Save 50%compared to  $135.00Underwear Weight:HeavyweightSize Type:Regular
- Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's$86.73Save 27%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Base Layer Hoodie - Men's$180.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's$140.00Underwear Weight:MidweightSize Type:Big
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to  $115.00Underwear Weight:MidweightSize Type:PlusREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Women's$250.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaRose Light Base Layer Top - Women's$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- HalfdaysFay Midweight Merino Base Layer Top - Women's$90.93 - $130.00Underwear Weight:MidweightSize Type:Regular
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Women's$81.73Save 48%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SpraywayEffra Jacket Base Layer Top - Women's$42.73Save 34%compared to  $64.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women'sTop Rated$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SpraywayEffra Crew Base Layer Top - Women's$36.73Save 26%compared to  $49.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Terramar2.0 Cloud Nine Half-Zip Base Layer Top - Women's$34.73Save 30%compared to  $50.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women's$53.83Save 50%compared to  $109.00Underwear Weight:LightweightSize Type:Regular
- SENIQWool Sculpt Merino Mock-Neck Long-Sleeve Base Layer Shirt - Women's$99.93 - $128.00Underwear Weight:HeavyweightSize Type:Regular
- Ortovox120 Comp Light Base Layer Hoody - Men's$120.00Underwear Weight:LightweightSize Type:Regular, Big
- ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's$65.73Save 45%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Base Layer Crew Top - Kids'Top Rated$60.00Underwear Weight:MidweightSize Type:Regular
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