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Lightweight Base Layers
(121 products)Products (121)
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- Kari TraaFierce Base Layer Pants - Women's$46.73Save 29%compared to  $66.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Terramar2.0 Thermolator Base Layer Pants - Men's$32.73Save 27%compared to  $45.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:BigREI OUTLET
- Arc'teryxRho Hoody Base Layer Top - Women'sTop Rated$120.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Plus
- Kari TraaSmekker Long-Sleeve Base Layer Top - Women's$89.73Save 25%compared to  $120.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall SizesTop Rated$89.95Underwear Weight:LightweightSize Type:Tall
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to  $66.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Base Layer 3/4 Bottoms - Men's$120.00Underwear Weight:LightweightSize Type:Regular
- REI Co-opMerino 185 Base Layer Bottoms - Women's Plus Sizes$79.95Underwear Weight:LightweightSize Type:Plus
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's$93.73Save 25%compared to  $125.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's$115.00Underwear Weight:LightweightSize Type:Regular, Big
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women's$109.00Underwear Weight:LightweightSize Type:Regular
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's$119.00Underwear Weight:LightweightSize Type:Regular, Big
- Terramar2.0 Thermolator Crew Base Layer Top - Kids'$24.73Save 29%compared to  $35.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- KUHLReactiv Lite Grid Base Layer Bottoms - Women's$99.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerSiren Sweetheart Long Underwear Top - Women's$85.00Underwear Weight:LightweightSize Type:Regular
- Free CountryCloud Knit Base Layer Bottoms - Women's$31.73Save 29%compared to  $45.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes$69.95Underwear Weight:LightweightSize Type:Plus
- KUHLReactiv Lite Grid Base Layer Bottoms - Men'sTop Rated$99.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho Merino Wool Base Layer Bottoms - Men's$120.00Underwear Weight:LightweightSize Type:Regular, Big
- Black DiamondSolution 150 Merino Base Layer Bottoms - Women'sTop Rated$79.73Save 27%compared to  $110.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men's$99.00Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- Kari TraaFryd Long-Sleeve Base Layer Top - Women's$40.73Save 32%compared to  $60.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:PlusREI OUTLET
- REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes$79.95Underwear Weight:LightweightSize Type:Big, Tall
- Wild RyeJane Leggings - Women's$64.73Save 40%compared to  $109.00Members use code OUTJAN26 for $20 off when you spend $100+ at REI Outlet.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's$115.00 - $135.00Underwear Weight:LightweightSize Type:Regular
- Ortovox120 Comp Light Short Base Layer Pants - Men's$70.00Underwear Weight:LightweightSize Type:Regular, Big
- Ortovox185 Rock'N'Wool Short Base Layer Pants - Men's$100.00 - $110.00Underwear Weight:LightweightSize Type:Regular, Big
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes$89.95Underwear Weight:LightweightSize Type:Plus
- Icebreaker150 Anatomica Crewe Base Layer Top - Men'sTop Rated$75.00Underwear Weight:LightweightSize Type:Regular, Big
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