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Base Layers
(447 products)Products (447)
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- Arc'teryxRho LT Crew Neck Base Layer Top - Men'sTop Rated$70.93 - $100.00
- Free CountryMicrotech Heat Cocaber Base Layer Bottoms - Women's$34.73Save 30%compared to  $50.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- tasc PerformanceElevation Merino T-Shirt - Women's$49.73Save 37%compared to  $79.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Kari TraaFierce Base Layer Pants - Women's$46.73Save 29%compared to  $66.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's$110.00
- ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's$75.73Save 36%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Helly HansenLifa Active Base Layer Bottoms - Women's$39.73Save 27%compared to  $55.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Helly HansenHH LIFA Base Layer Set - Kids'$70.00
- SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's$155.00
- Kari TraaLune Base Layer Pants - Women's$48.73Save 25%compared to  $65.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Free CountryForce Grid Fleece Base Layer Bottoms - Women's$34.73Save 36%compared to  $55.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- 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
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'$44.73Save 31%compared to  $65.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's$95.00
- Helly HansenLIFA Merino Midweight Graphic Base Layer Pants - Women's$79.73Save 27%compared to  $110.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- HalfdaysJohnson Base Layer Top - Women's$49.83Save 41%compared to  $85.00
- IcebreakerMerino Base Layer Leggings - Women's$149.73Save 25%compared to  $200.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's$39.83 - $90.00
- ArtilectFlatiron 185 Crew Base Layer Top - Men's$96.73 - $109.73Save 30% - 31%compared to  $140.00 - $160.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men'sTop Rated$109.73Save 31%compared to  $160.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's$54.83Save 50%compared to  $110.00
- Sale Ends Sep 1REI Co-opLightweight Base Layer Crew Top - Kids'Top Rated$20.89Save 30%compared to  $29.95
- REI Co-opHeavyweight Merino Base Layer Bottoms - Men's$99.95
- SpraywayEffra Leggings Base Layer Bottoms - Women's$36.73Save 26%compared to  $49.95Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- REI Co-opMerino 185 Base Layer Top - Men's$69.95
- Sale Ends Sep 1REI Co-opLightweight Base Layer Bottoms - Kids'Top Rated$20.89Save 30%compared to  $29.95
- Icebreaker200 Oasis Sonebula Base Layer Leggings - Women's$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- CraftCORE Dry Active Comfort Base Layer Top - Women's$39.73Save 38%compared to  $64.95Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Lettuce Edge Crew Base Layer Top - Women's$82.73Save 28%compared to  $115.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Icebreaker260 Tech High-Rise Base Layer Leggings - Women'sTop Rated$125.00
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