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Long Sleeve Base Layer Tops
(244 products)Products (244)
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- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men'sTop Rated$78.73Save 25%compared to  $105.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men'sTop Rated$51.83 - $105.00Underwear Weight:MidweightSize Type:Regular, Big
- SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's$82.73Save 28%compared to  $115.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's$95.00Underwear Weight:MidweightSize Type:Regular, Big
- Black DiamondSolution 150 Merino Base Layer Crew Top - Women'sTop Rated$99.73Save 26%compared to  $135.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- REI Co-opLightweight Base Layer Crew Top - Kids'Top Rated$29.95Underwear Weight:LightweightSize Type:Regular
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's$104.95Underwear Weight:HeavyweightSize Type:Regular, Big, Tall
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall SizesTop Rated$79.95Underwear Weight:LightweightSize Type:Tall, Big
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women'sTop Rated$104.95Underwear Weight:HeavyweightSize Type:Regular, Plus
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men'sTop Rated$69.93 - $99.00Underwear Weight:MidweightSize Type:Regular, Big
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's$109.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's$140.00Underwear Weight:MidweightSize Type:Regular, Big
- Kari TraaFryd Long-Sleeve Base Layer Top - Women's$44.73Save 25%compared to  $60.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men'sTop Rated$109.73Save 31%compared to  $160.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Men'sTop Rated$79.73Save 27%compared to  $110.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's$89.73Save 25%compared to  $120.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$47.73Save 36%compared to  $75.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's$119.00Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$130.00Underwear Weight:MidweightSize Type:Regular, Big
- Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's$54.83Save 50%compared to  $110.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men'sTop Rated$109.73Save 26%compared to  $150.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$89.95Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$89.73Save 25%compared to  $120.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men'sTop Rated$125.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Hot ChillysClima-Wool Crew Base Layer Top - Men'sNew arrival$79.73Save 33%compared to  $120.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$92.73Save 28%compared to  $130.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's$99.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Free CountryCloud Knit Crewneck Base Layer Top - Men'sNew arrival$26.73Save 33%compared to  $40.00Members use code OUTFALL25 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's$90.00Underwear Weight:UltralightweightSize Type:Regular, Big
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men's$99.00Underwear Weight:LightweightSize Type:Regular, Big
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