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Underwear
(538 products)Products (538)
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- IcebreakerMerino 260 Vertex Natural Shades Base Layer Leggings - Women's$104.73Save 25%compared to  $140.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 200 Sonebula Thermal Base Layer Leggings - Women's$120.00
- Icebreaker200 Oasis Macro Forms Base Layer Leggings - Women's$85.73Save 25%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Arc'teryxKyanite Base Layer Bottoms - Women's$96.73Save 19%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Base Layer Pants - Women's$81.93Save 25%compared to  $110.00
- Helly HansenH1 Pro Lifa Seamless Base Layer Bottoms - Women's$82.73Save 24%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$59.83 - $115.00
- Kari TraaRose High-Waist Base Layer Capris - Women's$74.73Save 25%compared to  $100.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's$109.00
- Kari TraaSara Base Layer Pants - Women's$100.00
- Kari TraaLune Base Layer Pants - Women's$48.73Save 25%compared to  $65.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaSaga Base Layer Pants - Women'sNew arrival$110.00
- KUHLReactiv Lite Grid Base Layer Bottoms - Women'sNew arrival$99.00
- Kari TraaAnna High-Waist Base Layer Pants - Women'sNew arrival$100.00
- Arc'teryxRho Hybrid Insulated Base Layer Bottoms - Women's$145.73Save 19%compared to  $180.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- REI Co-opMidweight Long-Sleeve Base Layer Top - Women's$54.95
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$81.73Save 28%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women'sTop Rated$59.83 - $120.00
- Nani SwimwearUinta Base Layer Top - Women's$29.83Save 62%compared to  $80.00
- tasc PerformanceElevation Merino T-Shirt - Women's$49.73Save 37%compared to  $79.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women'sTop Rated$29.83 - $104.95
- REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes$48.93 - $69.95
- REI Co-opLightweight Half-Zip Base Layer Top - Women's$44.95
- SmartwoolIntraknit Active Long-Sleeve Base Layer Top - Women's$79.93Save 27%compared to  $110.00
- Helly HansenVerglas Half-Zip Top - Women's$63.73Save 25%compared to  $85.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women'sTop Rated$105.00
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women'sTop Rated$78.73Save 25%compared to  $105.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's$82.73Save 28%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 260 Vertex Long-Sleeve Crewe Natural Shades Base Layer Top - Women's$104.73Save 25%compared to  $140.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's$95.00
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