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Long Underwear
(366 products)Products (366)
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- REI Co-opLightweight Base Layer Crew Top - Kids'Top Rated$29.95
- SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's$59.83Save 53%compared to  $130.00
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$150.00
- Helly HansenLIFA Merino Midweight Crew Base Layer Top - Women's$69.73Save 30%compared to  $100.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Base Layer Crew Top - Women's$110.00
- SmartwoolIntraknit Active Base Layer Crew Shirt - Women's$76.73Save 30%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$110.00
- SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's$155.00
- 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
- Helly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men's$110.00
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Men's$104.73Save 30%compared to  $150.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- 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
- The North FaceFD Pro 160 Base Layer Crew Top - Women's$70.00
- Helly HansenLifa Merino Midweight Base Layer Set - Kids'$69.73Save 30%compared to  $100.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- REI Co-opLightweight Crew Base Layer Top - Infants'/Toddlers'Top Rated$19.95
- REI Co-opLightweight Crew Base Layer Top - Women'sTop Rated$29.95
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$130.00
- 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
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women'sNew arrival$119.00
- Kari TraaSilja Half-Zip 2.0 Base Layer Top - Women'sNew arrival$110.00
- 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
- Helly HansenLifa Merino Midweight Crew Base Layer Top - Men's$100.00
- Helly HansenLIFA Merino Midweight Base Layer Set - Kids'$100.00
- NRSLightweight Union Suit - Women's$76.93Save 30%compared to  $109.95
- NRSExpedition Union Suit - Women's$111.93Save 30%compared to  $159.95
- Helly HansenHH LIFA Base Layer Set - Kids'$70.00
- tasc PerformanceElevation Merino Base Layer Bottoms - Women's$49.73Save 37%compared to  $79.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- PatagoniaBaby Capilene Midweight Henley Base Layer Top - Infants'$23.93Save 31%compared to  $35.00
- Nani SwimwearUinta Base Layer Bottoms - Women'sTop Rated$29.83Save 60%compared to  $75.00
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