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Hiking Underwear Mens
(188 products)Products (188)
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- Free CountryForce Grid Fleece Base Layer Top - Men's$29.73Save 33%compared to  $45.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Ortovox120 Comp Light Base Layer Hoody - Men's$120.00
- ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's$79.73Save 38%compared to  $130.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceSpeakeazy Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceDockerson Boxer Briefs - Men's$19.73Save 34%compared to  $30.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceCasa Playa Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Free CountryMicrotech Heat Base Layer Bottoms - Men's$31.73Save 29%compared to  $45.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Arc'teryxRho Merino Wool Base Layer Bottoms - Men's$96.93Save 19%compared to  $120.00
- ArtilectFlatiron 185 Crew Base Layer Top - Men's$96.73 - $109.73Save 30% - 31%compared to  $140.00 - $160.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- IcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Men's$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men'sTop Rated$99.00
- Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Men's$105.00
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$130.00
- PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's$109.00
- ZoicEssential Liner Bike Shorts with Fly - Men's$35.00
- Icebreaker125 ZoneKnit Merino Long-Sleeve Crewe Thermal Top - Men'sTop Rated$93.73Save 25%compared to  $125.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- Ortovox185 Rock'n'wool Short Base Layer Pants - Men's$100.00
- StanceTubeular Boxer Briefs - Men's$18.73Save 25%compared to  $25.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall SizesTop Rated$79.95
- StancePoppyland Boxer Briefs - Men's$18.73Save 25%compared to  $25.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- SaxxTraining Shorts Liner - Men's$29.73Save 25%compared to  $40.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- 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
- Royal RobbinsReadyDry 4" Boxer Briefs - Men's$19.73Save 29%compared to  $28.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- PatagoniaDirt Roamer Bike Liner Shorts - Men's$99.00
- SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men'sTop Rated$66.73Save 25%compared to  $90.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes$79.95
- StanceOde To Cali Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceFull Moon Boxer Briefs - Men's$22.73Save 24%compared to  $30.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceOcean Blue Boxer Briefs - Men's$22.73Save 24%compared to  $30.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
- StanceSunrise Boxer Briefs - Men's$18.73Save 25%compared to  $25.00Members use code OUT4JUL25 for $20 off $100+ at REI OutletREI OUTLET
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