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Base Layers
(454 products)Products (454)
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- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$130.00
- IcebreakerMerino 260 Vertex Long-Sleeve Crewe Thermal Base Layer Top - Women's$99.73Save 28%compared to  $140.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's$93.73Save 25%compared to  $125.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Icebreaker125 ZoneKnit Thermal Base Layer Leggings - Women's$86.73Save 30%compared to  $125.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's$85.00 - $100.00
- Kari TraaEmbla Wool Base Layer Top - Women's$29.83Save 50%compared to  $60.00
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Macro Forms Base Layer Top - Women's$85.73Save 25%compared to  $115.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$47.73Save 36%compared to  $75.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Kari TraaSara Long-Sleeve Base Layer Top - Women'sNew arrival$74.73Save 25%compared to  $100.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Helly HansenLIFA Merino Midweight 2-In-1 Base Layer Pants - Women's$69.73Save 30%compared to  $100.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Crew Neck Base Layer T-Shirt - Women's$75.00
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's$104.95
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's$95.00
- IcebreakerMerino 260 Tech Thermal Base Layer Leggings - Kids'Top Rated$49.73Save 28%compared to  $70.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's$90.00
- SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Women'sNew arrival$250.00
- Kari TraaFloke Base Layer Pants - Women's$64.73Save 35%compared to  $100.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to  $115.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Sale Ends Aug 28Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men'sTop Rated$74.99Save 50%compared to  $150.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$92.73Save 28%compared to  $130.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Sale Ends Aug 28IcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men'sTop Rated$82.49Save 50%compared to  $165.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's$96.73Save 25%compared to  $130.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- Kari TraaElse Half-Zip Base Layer Top - Women's$76.73Save 30%compared to  $110.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's$96.73Save 25%compared to  $130.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men'sTop Rated$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'$51.73Save 26%compared to  $70.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- KUHLReactiv Lite Grid Base Layer Bottoms - Men's$99.00
- Kari TraaKlara High-Waisted Base Layer Pants - Women's$66.73Save 25%compared to  $90.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall SizesTop Rated$89.95
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Kids'$52.73Save 29%compared to  $75.00Members use code LABORDAY2025 for an extra 20% off at REI OutletREI OUTLET
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