Skip to search results
loaded 216 results
Base Layers: Deals
(216 products)Products (216)
Sort: Best Match
- Free CountryForce Grid Fleece Base Layer Top - Men'sTop Rated$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- Kari TraaFryd Base Layer Pants - Women's$40.73Save 25% - 32%compared to  $55.00 - $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women's$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Terramar2.0 Cloud Nine Half-Zip Base Layer Top - Women's$34.73Save 30%compared to  $50.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's$86.73Save 27%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Free CountryCloud Knit Base Layer Bottoms - Men's$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Hot ChillysOriginals Solid Base Layer Pants - Kids'$34.73Save 26%compared to  $47.50Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar3.0 Thermawool Crew Base Layer Top - Women's$49.73 - $52.73Save 24% - 28%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Active Base Layer Crew Shirt - Women's$79.73Save 27%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Free CountryForce Grid Fleece Base Layer Bottoms - Women's$34.73Save 36%compared to  $55.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Active Base Layer Bottoms - Men's$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:Big, RegularREI OUTLET
- Sale Ends Dec 8Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$86.19Save 25%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, Big
- Free CountryMicrotech Heat Cocarber Base Layer Bottoms - Women's$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Sale Ends Dec 8Icebreaker300 MerinoFine Polar Thermal Base Layer Leggings - Men'sNew arrival$149.99Save 25%compared to  $200.00Underwear Weight:HeavyweightSize Type:Regular, Big
- IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's$119.73Save 25%compared to  $160.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's$78.73Save 25%compared to  $105.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'$51.73Save 26%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Sale Ends Dec 8Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men's$187.49Save 25%compared to  $250.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Free CountryForce Grid Fleece Base Layer Bottoms - Men's$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$47.73Save 36%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's$92.73Save 28%compared to  $130.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's$99.73Save 26%compared to  $135.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Sale Ends Dec 8IcebreakerMerino 200 Oasis+ Long-Sleeve Half-Zip Thermal Base Layer Hoodie - Men'sNew arrival$112.49Save 25%compared to  $150.00Underwear Weight:MidweightSize Type:Regular, Big
- CraftCore Dry Active Comfort Base Layer Pants - Men's$32.73Save 34%compared to  $49.95Underwear Weight:MidweightSize Type:RegularREI OUTLET
- CraftCORE Dry Active Comfort Base Layer Top - Women's$39.73Save 38%compared to  $64.95Underwear Weight:MidweightSize Type:RegularREI OUTLET
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men'sTop Rated$95.73Save 40%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Hot ChillysClima-Wool Base Layer Bottoms - Men's$79.73Save 33%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Men'sTop Rated$79.73Save 27%compared to  $110.00Underwear Weight:MidweightSize Type:BigREI OUTLET
61–90 of 216 products
Sort: Best Match


















































































































