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Moisture Wicking Base Layers
(323 products)Products (323)
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- Helly HansenLIFA Merino Midweight 3/4 Base Layer Pants - Men's$80.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's$59.83Save 53%compared to  $130.00Underwear Weight:MidweightSize Type:Regular
- Nani SwimwearUinta Base Layer Bottoms - Women'sTop Rated$29.83Save 60%compared to  $75.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's$155.00Underwear Weight:MidweightSize Type:Regular, Big
- KUHLReactiv Lite Grid Base Layer Bottoms - Men'sNew arrival$99.00Underwear Weight:LightweightSize Type:Regular
- Arc'teryxRho Base Layer Hoody - Women'sTop Rated$96.73Save 19%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Thermal Weight Long Underwear Bottoms - Women's$99.00Underwear Weight:HeavyweightSize Type:Regular
- PatagoniaCapilene Midweight Base Layer Bottoms - Women's$89.00Size Type:Regular, Plus
- PatagoniaCapilene Midweight Crew Base Layer Top - Men'sTop Rated$89.00Underwear Weight:MidweightSize Type:Regular, Big
- CraftActive Intensity Base Layer Pants - Women's$31.73Save 42%compared to  $54.95Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Base Layer Bottoms - Kids'$26.93Save 30%compared to  $39.00Underwear Weight:MidweightSize Type:Regular
- PatagoniaCapilene Midweight Crew Base Layer Top - Women'sTop Rated$89.00Underwear Weight:MidweightSize Type:Regular, Plus
- Nani SwimwearUinta Base Layer Top - Women's$29.83Save 62%compared to  $80.00Underwear Weight:MidweightSize Type:Regular, Plus
- PatagoniaCapilene Midweight Crew Base Layer Top - Kids'$26.93Save 30%compared to  $39.00Underwear Weight:MidweightSize Type:Regular
- 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
- Arc'teryxLana Merino Wool Crew Base Layer Top - Women's$90.00Underwear Weight:LightweightSize Type:Regular, Plus
- PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's$99.00Underwear Weight:HeavyweightSize Type:Regular
- PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's$109.00Underwear Weight:HeavyweightSize Type:Regular
- BurtonMidweight Base Layer Pants - Women's$19.83Save 69%compared to  $64.95Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men'sTop Rated$105.00Underwear Weight:MidweightSize Type:Regular, Big
- Free CountryMicrotech Heat Cocaber Base Layer Top - Men's$21.73Save 45%compared to  $40.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:BigREI OUTLET
- Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men'sTop Rated$59.83 - $120.00Underwear Weight:MidweightSize Type:Big, Regular
- Icebreaker200 Sonebula Leggings - Men's$89.73Save 25%compared to  $120.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Arc'teryxRho Boot Cut Base Layer Bottoms - Women's$72.73Save 19%compared to  $90.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's$75.00Underwear Weight:UltralightweightSize Type:Regular, Big
- Terramar3.0 Thermawool Crew Base Layer Top - Women's$49.73 - $52.73Save 24% - 28%compared to  $70.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Women's$34.73Save 30%compared to  $50.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's$135.00Underwear Weight:LightweightSize Type:Regular, Big
- Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Women'sTop Rated$105.00Underwear Weight:LightweightSize Type:Regular
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