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Outdoor Underwear
(517 products)Products (517)
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- IcebreakerMerino 200 Sonebula Thermal Base Layer Leggings - Women's$120.00
- Terramar2.0 Ultra Merino Turtleneck Base Layer Top - Women's$52.73Save 29%compared to  $75.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaRose Boxers - Women's$29.73Save 25%compared to  $40.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenLIFA Merino Midweight Base Layer Set - Kids'$100.00
- The North FaceFD Pro 160 Base Layer Crew Top - Women's$70.00
- Wild RyeHailey Half-Zip Base Layer Top - Women's$69.73Save 41%compared to  $119.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- prAnaLuxara Reversible Crop Top - Women's$65.00
- Ortovox185 Merino Rock'n'wool Base Layer Top - Women's$49.83Save 50%compared to  $100.00
- Icebreaker200 Oasis 3/4 Base Layer Bottoms - Men's$95.00
- SmartwoolIntraknit Thermal Merino Base Layer 3/4 Bottoms - Men's$120.00
- Helly HansenOdin Power Stretch Half-Zip Base Layer Top - Women's$88.73Save 40%compared to  $150.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men'sNew arrival$119.00
- Helly HansenHH LIFA Base Layer Set - Kids'$70.00
- IcebreakerMerino 150 Siren Bra$34.73Save 30%compared to  $50.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- 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
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men'sNew arrival$109.00
- NRSLightweight Union Suit - Women's$76.93Save 30%compared to  $109.95
- 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
- KUHLReactiv Lite Grid Base Layer Bottoms - Men'sNew arrival$99.00
- Beyond YogaGet Across Bra$64.00
- Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Hoodie - Men's$89.73Save 25%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Women'sNew arrival$109.00
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women'sNew arrival$119.00
- Helly HansenLifa Merino Midweight Crew Base Layer Top - Men's$100.00
- KUHLReactiv Lite Grid Base Layer Bottoms - Women'sNew arrival$99.00
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$44.73Save 32%compared to  $66.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$130.00
- Kari TraaSilja Half-Zip 2.0 Base Layer Top - Women'sNew arrival$110.00
- Kari TraaSara Base Layer Pants - Women's$100.00
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