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- REI Co-opMidweight Long-Sleeve Base Layer Top - Women's$26.83 - $54.95
- REI Co-opMidweight Base Layer Tights - Women's$26.83 - $54.95
- REI Co-opMidweight Long-Sleeve Base Layer Top - Men'sTop Rated$26.83 - $54.95
- REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women'sTop Rated$39.95
- REI Co-opLightweight Base Layer Bottoms - Men'sTop Rated$39.95
- REI Co-opMidweight Base Layer Bottoms - Men's$54.95
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's$66.93 - $90.00
- Kari TraaFryd Base Layer Top - Women's$29.83 - $65.00
- REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men'sTop Rated$29.93 - $39.95
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men'sTop Rated$79.95
- tasc PerformanceElevation Merino Base Layer Bottoms - Men's$34.73 - $54.73Save 30% - 56%compared to  $79.00REI OUTLET
- REI Co-opMidweight Base Layer Bottoms - Kids'Top Rated$16.83 - $34.95
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men'sTop Rated$44.83 - $90.00
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$81.73Save 28%compared to  $115.00REI OUTLET
- tasc PerformanceElevation Merino Base Layer Bottoms - Women's$34.73 - $54.73Save 30% - 56%compared to  $79.00REI OUTLET
- REI Co-opMerino 185 Base Layer Bottoms - Men's$79.95
- REI Co-opLightweight Base Layer Tights - Women'sTop Rated$39.95
- REI Co-opMidweight Base Layer Half-Zip Top - Women's$59.95
- REI Co-opMidweight Base Layer Half-Zip Top - Men'sTop Rated$59.95
- Arc'teryxRho Base Layer Bottoms - Women's$24.83 - $100.00
- REI Co-opMerino 185 Base Layer Bottoms - Women's$79.95
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Men'sTop Rated$115.00
- Kari TraaFryd Base Layer Pants - Women's$29.83 - $65.00
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$115.00
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's$115.00
- REI Co-opMidweight Base Layer Crew Top - Kids'Top Rated$34.95
- REI Co-opHeavyweight Merino Base Layer Bottoms - Men's$99.95
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$89.95
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Men'sTop Rated$115.00
- tasc PerformanceElevation Merino T-Shirt - Men's$34.73 - $54.73Save 30% - 56%compared to  $79.00REI OUTLET
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