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Long Sleeve Underwear
(254 products)Products (254)
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- Icebreaker260 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women'sTop Rated$119.73Save 27%compared to  $165.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaAlma Half-Zip Base Layer Top - Women's$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- Kari TraaKaia Base Layer Set - Women's$130.00Underwear Weight:LightweightSize Type:Regular
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's$115.00 - $135.00Underwear Weight:LightweightSize Type:Regular
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$110.00 - $115.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaElse Long-Sleeve Base Layer Top - Women'sNew arrival$69.73Save 30%compared to  $100.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- BurtonFleece Base Layer Set - Toddlers'$64.95Underwear Weight:HeavyweightSize Type:Regular
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Women's$98.73Save 38%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Balaclava Hoodie - Women's$106.73Save 28%compared to  $150.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker260 Tech Vertex Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$150.00Underwear Weight:HeavyweightSize Type:Regular
- IcebreakerMerino 260 ZoneKnit Half-Zip Base Layer Top - Women's$185.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaRose Long-Sleeve Base Layer Top - Women's$79.73Save 27%compared to  $110.00Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- NRSH2Core Lightweight Union Suit - Men's$109.95Underwear Weight:LightweightSize Type:Regular
- Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'Top Rated$60.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's$90.00Underwear Weight:UltralightweightSize Type:Regular
- Arms of Andes300 Lightweight Alpaca Wool Pullover Base Layer Hoodie - Women's$140.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Base Layer Top - Women's$120.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's$150.00Underwear Weight:MidweightSize Type:Regular, Plus
- StioBasisPeak Wool Midweight Half-Zip Base Layer Top - Women's$149.00Underwear Weight:MidweightSize Type:Regular
- Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'$32.73Save 34%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Hoodie - Women'sTop Rated$119.00Underwear Weight:LightweightSize Type:Regular, Plus
- Helly HansenLifa Merino Midweight Base Layer Crew Top - Women's$105.00Underwear Weight:MidweightSize Type:Regular, Plus
- The North FaceFD Pro 160 Base Layer Crew Top - Women's$70.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLIFA Merino Midweight Graphic Base Layer Crew Top - Women's$110.00 - $115.00Underwear Weight:MidweightSize Type:Regular
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$150.00 - $155.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaSaga Half-Zip Base Layer Top - Women's$135.00Underwear Weight:HeavyweightSize Type:Regular
- Deux par DeuxThermal Underwear Base Layer Set - Toddlers'$72.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFaith Half-Zip Base Layer Top - Women'sNew arrival$86.73Save 27%compared to  $120.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 ZoneKnit Long-Sleeve Crew Base Layer Top - Women's$175.00Underwear Weight:HeavyweightSize Type:Regular
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