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- Sale Ends May 25Icebreaker260 Merino Tech Thermal Leggings with Fly - Men'sTop Rated$104.99Save 25%compared to $140.00
- Sale Ends May 25Kari TraaAlma Pants - Women's$48.09Save 46%compared to $90.00REI OUTLET
- Black DiamondSolution 150 Quarter-Zip Hoody - Women's$99.73Save 31%compared to $145.00REI OUTLET
- Arc'teryxKyanite Zip-Neck Base Layer Top - Women'sTop Rated$98.83Save 29%compared to $140.00
- Sale Ends May 25SmartwoolClassic Thermal Merino Base Layer Bottoms - Men'sTop Rated$93.69Save 25%compared to $125.00
- Sale Ends May 25REI Co-opLightweight Crew Base Layer Top - Women'sTop Rated$26.19Save 25%compared to $34.95
- Sale Ends May 25REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men'sTop Rated$59.89Save 25%compared to $79.95
- REI Co-opMidweight Base Layer Crew Top - Toddlers'Top Rated$17.93Save 28%compared to $24.95
- Sale Ends May 25SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men'sTop Rated$97.49Save 25%compared to $130.00
- REI Co-opMidweight Base Layer Bottoms - Kids'Top Rated$25.93Save 25%compared to $34.95
- Sale Ends May 25REI Co-opLightweight Half-Zip Base Layer Top - Women'sTop Rated$37.39Save 25%compared to $49.95
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women'sTop Rated$69.73Save 26%compared to $95.00REI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'$44.73Save 25% - 31%compared to $60.00 - $65.00REI OUTLET
- REI Co-opMerino Midweight Base Layer Bottoms - Kids'Top Rated$24.83Save 50%compared to $49.95
- SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's$49.83 - $104.99Save 25% - 64%compared to $140.00
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men'sTop Rated$89.73Save 25%compared to $120.00REI OUTLET
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$49.83Save 61% - 64%compared to $130.00 - $140.00
- Kari TraaKlara High-Waisted Base Layer Pants - Women's$46.69 - $62.73Save 30% - 48%compared to $90.00REI OUTLET
- Wild RyeBassett LITE Base Layer Leggings - Women's$29.83Save 66%compared to $89.00
- Arc'teryxSatoro Merino Wool Crew Neck Long-Sleeve Base Layer Top - Women's$95.73Save 20%compared to $120.00REI OUTLET
- Sale Ends May 25Kari TraaRose High-Waisted Base Layer Pants - Women'sTop Rated$83.99Save 30%compared to $120.00
- Arc'teryxSatoro Merino Wool Base Layer Bottoms - Women's$95.73Save 20%compared to $120.00REI OUTLET
- Ortovox230 Competition Long Base Layer Pants - Men's$100.00
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Men'sTop Rated$84.73Save 26%compared to $115.00REI OUTLET
- Sale Ends May 25Kari TraaRose Light Capri Base Layer Pants - Women's$52.29Save 47%compared to $100.00REI OUTLET
- Kari TraaSval Base Layer Pants - Women's$48.73Save 30%compared to $70.00REI OUTLET
- SmartwoolClassic Thermal Merino 3/4 Base Layer Bottoms - Men's$78.73Save 25%compared to $105.00REI OUTLET
- Black DiamondCoefficient LT One Piece Base Layer - Men's$149.73Save 31%compared to $219.00REI OUTLET
- Wild RyeBassett Base Layer Leggings - Women's$39.83Save 65%compared to $115.00
- Sale Ends May 25Icebreaker260 Tech High-Rise Base Layer Leggings - Women'sTop Rated$93.69Save 25%compared to $125.00
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