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- REI Co-opMidweight Long-Sleeve Base Layer Top - Women's$26.83 - $38.39Save 30% - 51%compared to  $54.95
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men'sTop Rated$29.83 - $79.95
- REI Co-opMidweight Base Layer Tights - Women's$26.83 - $38.39Save 30% - 51%compared to  $54.95
- REI Co-opMidweight Long-Sleeve Base Layer Top - Men'sTop Rated$26.83 - $38.39Save 30% - 51%compared to  $54.95
- Sale Ends Sep 1REI Co-opMidweight Base Layer Half-Zip Top - Men'sTop Rated$41.89Save 30%compared to  $59.95
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's$44.83 - $90.00
- Sale Ends Sep 1REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women'sTop Rated$27.89Save 30%compared to  $39.95
- REI Co-opMidweight Base Layer Half-Zip Top - Women's$19.83 - $41.89Save 30% - 66%compared to  $59.95
- REI Co-opMidweight Base Layer Crew Top - Kids'Top Rated$23.93 - $34.95
- Sale Ends Sep 1REI Co-opLightweight Half-Zip Base Layer Top - Women's$31.39Save 30%compared to  $44.95
- Sale Ends Sep 1REI Co-opLightweight Base Layer Bottoms - Men'sTop Rated$27.89Save 30%compared to  $39.95
- Sale Ends Sep 1REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men'sTop Rated$27.89Save 30%compared to  $39.95
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$81.73Save 28%compared to  $115.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Sale Ends Sep 1REI Co-opLightweight Base Layer Bottoms - Infants'/Toddlers'Top Rated$13.89Save 30%compared to  $19.95
- Sale Ends Sep 1REI Co-opLightweight Crew Base Layer Top - Women'sTop Rated$20.89Save 30%compared to  $29.95
- Sale Ends Sep 1REI Co-opLightweight Crew Base Layer Top - Infants'/Toddlers'Top Rated$13.89Save 30%compared to  $19.95
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$29.83 - $89.95
- Sale Ends Sep 1REI Co-opMidweight Base Layer Bottoms - Men's$38.39Save 30%compared to  $54.95
- REI Co-opMidweight Base Layer Bottoms - Kids'Top Rated$23.93 - $34.95
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Arc'teryxRho Base Layer Bottoms - Women's$24.83 - $100.00
- REI Co-opMerino 185 Base Layer Top - Women's$34.83 - $69.95
- Nani SwimwearUinta Base Layer Top - Women's$19.83Save 75%compared to  $80.00
- SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women'sTop Rated$120.00
- tasc PerformanceElevation Merino Base Layer Bottoms - Men's$49.73Save 37%compared to  $79.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men'sTop Rated$44.83 - $90.00
- Arc'teryxIonia Merino Wool Base Layer Top - Men'sTop Rated$63.93Save 28%compared to  $90.00
- REI Co-opMerino 185 Base Layer Bottoms - Men's$79.95
- Kari TraaFryd Base Layer Top - Women's$29.83 - $65.00
- PatagoniaCapilene Midweight Base Layer Bottoms - Men'sTop Rated$59.93 - $89.00
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