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Base Layer Bottoms: Deals
(92 products)Products (92)
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- SmartwoolIntraknit Active Base Layer Bottoms - Men's$81.73Save 25%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:Regular, BigREI 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 OutletUnderwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Arc'teryxRho Insulated 3/4 Base Layer Bottoms - Men'sTop Rated$159.73Save 20%compared to  $200.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- PatagoniaCapilene Midweight Base Layer Bottoms - Infants'$21.73Save 25%compared to  $29.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI 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 OutletUnderwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Kari TraaLucie Base Layer Pants - Women's$59.73Save 25%compared to  $80.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLifa Merino Midweight Base Layer Set - Kids'$69.73Save 30%compared to  $100.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenMerino Wool Base Layer Set - Kids'$75.73Save 36%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaLucie Base Layer Bottoms - Women's$39.83Save 50%compared to  $80.00Underwear Weight:MidweightSize Type:Regular
- 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 OutletUnderwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Free CountryMicrotech Heat Cocaber Base Layer Bottoms - Women's$34.73Save 30%compared to  $50.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Arc'teryxKyanite Base Layer Bottoms - Women's$96.73Save 19%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:HeavyweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Lettuce Edge Base Layer Bottoms - Women's$82.73Save 28%compared to  $115.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- SaxxRoast Master Midweight Base Layer Bottoms - Men's$52.73Save 29%compared to  $75.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Kari TraaRose High-Waist Base Layer Pants - Women's$76.73Save 30%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaSmekker Base Layer Pants - Women's$89.73Save 25%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- 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 OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- HalfdaysSophia Base Layer Leggings - Women's$49.83Save 41%compared to  $85.00Underwear Weight:LightweightSize Type:Plus, Regular
- Kari TraaMalia Base Layer Pants - Women's$52.73Save 24%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- 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 OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET
- Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Women's$69.73Save 30%compared to  $100.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaRose Light High-Waisted Base Layer Pants - Women's$82.73Save 24%compared to  $110.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar3.0 Thermawool Base Layer Tights - Women's$52.73Save 24%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaFryd Base Layer Pants - Women's$44.73Save 25%compared to  $60.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI 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 OutletUnderwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- 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 OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- Kari TraaFryd Base Layer Pants - Women's$37.73 - $44.73Save 25% - 37%compared to  $55.00 - $60.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis Base Layer Leggings - Kids'$41.93Save 30%compared to  $60.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaMina Base Layer Pants - Women's$44.73Save 25%compared to  $60.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
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