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- PatagoniaCapilene Thermal Weight Long-Underwear Bottoms - Men's$99.00
- IcebreakerMerino 200 Oasis Thermal Leggings - Women's$105.00
- Arc'teryxKyanite Zip-Neck Base Layer Top - Women's$112.73Save 19%compared to  $140.00REI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$115.00
- REI Co-opMidweight Base Layer Crew Top - Kids'Top Rated$34.95
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men'sTop Rated$49.83 - $99.00
- SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women'sTop Rated$120.00
- REI Co-opMidweight Base Layer Bottoms - Toddlers'Top Rated$24.95
- REI Co-opMidweight Crew Base Layer Top - Toddlers'Top Rated$24.95
- REI Co-opMerino 185 Base Layer Bottoms - Men's$79.95
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's$79.95
- REI Co-opLightweight Crew Base Layer Top - Toddlers'Top Rated$19.95
- REI Co-opLightweight Base Layer Bottoms - Toddlers'Top Rated$19.95
- REI Co-opHeavyweight Merino Base Layer Bottoms - Men's$99.95
- SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's$90.00
- Helly HansenMerino Wool Base Layer Set - Kids'$75.73Save 36%compared to  $120.00REI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'Top Rated$46.73Save 28%compared to  $65.00REI OUTLET
- REI Co-opHeavyweight Merino Base Layer Bottoms - Women'sTop Rated$99.95
- Kari TraaRose High-Waisted Base Layer Pants - Women's$54.83 - $130.00
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's$81.73Save 28%compared to  $115.00REI OUTLET
- REI Co-opLightweight Base Layer Crew Top - Kids'Top Rated$29.95
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'$44.73 - $46.73Save 28% - 31%compared to  $65.00REI OUTLET
- SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's$90.00
- REI Co-opLightweight Crew Base Layer Top - Men's$29.95
- REI Co-opLightweight Base Layer Bottoms - Kids'Top Rated$29.95
- REI Co-opMerino Midweight Base Layer Bottoms - Kids'Top Rated$49.95
- REI Co-opMerino 185 Base Layer Top - Women's$69.95
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's$130.00
- Helly HansenGraphic Lifa Merino Base Layer Set - Kids'$74.73Save 32%compared to  $110.00REI OUTLET
- Arc'teryxKyanite Base Layer Bottoms - Women's$96.73Save 19%compared to  $120.00REI OUTLET
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