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Long Underwear
(364 products)Products (364)
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- The North FaceFD Pro 160 Base Layer Tights - Women's$70.00
- Mountain HardwearMountain Stretch Base Layer Tights - Men's$46.73Save 37%compared to  $75.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Terramar2.0 Cloud Nine Midweight Base Layer Capri Pants - Women's$28.73Save 28%compared to  $40.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SpraywayEffra Leggings Base Layer Bottoms - Women's$36.73Save 26%compared to  $49.95Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Arc'teryxLana Merino Wool Base Layer Tank Top - Women's$90.00
- Arc'teryxLana Merino Wool Crew Base Layer Top - Women's$90.00
- The North FaceSummit Pro 120 Base Layer Tights - Women's$100.00
- Kari TraaEmbla Wool Base Layer Top - Women's$60.00
- TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Joggers - Women's$56.73Save 29%compared to  $80.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Pants - Men's$56.73Save 29%compared to  $80.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenHH Durawool Graphic T-Shirt - Women's$90.00
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's$84.73Save 26%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- TerramarC-Suite Fusion Thermal Pants - Women's$46.73Save 28%compared to  $65.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- The North FaceSummit Series Pro 120 Base Layer Tights - Women'sTop Rated$100.00
- IcebreakerMerino 260 Tech Thermal Base Layer Leggings - Women'sTop Rated$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Icebreaker125 ZoneKnit Thermal Base Layer Leggings - Women's$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaLucie Base Layer Pants - Women's$59.73Save 25%compared to  $80.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Icebreaker200 ZoneKnit Thermal Base Layer Leggings - Women's$109.73Save 26%compared to  $150.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaSmekker Base Layer Pants - Women's$89.73Save 25%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolIntraknit Thermal Max Merino Base Layer Bottoms - Women's$100.73Save 25%compared to  $135.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 260 Tech Thermal Base Layer Leggings - Kids'Top Rated$49.73Save 28%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaMalia Base Layer Pants - Women's$52.73Save 24%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 260 Tech Thermal Base Layer Leggings With Fly - Men'sTop Rated$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Helly HansenHH Durawool T-Shirt - Women's$80.00
- Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Kari TraaAlma Base Layer Pants - Women's$52.73Save 24%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Icebreaker260 ZoneKnit Base Layer Leggings - Men'sTop Rated$119.73Save 27%compared to  $165.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SmartwoolIntraknit Active Base Layer Bottoms - Men's$81.73Save 25%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Icebreaker200 ZoneKnit Merino Thermal Base Layer Leggings - Men's$109.73Save 26%compared to  $150.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
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