Skip to search results
loaded 333 results
Base Layers
(333 products)Products (333)
Sort: Best Match
- Kari TraaAlma Pants - Women'sNew arrival$68.73Save 23%compared to  $90.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit AS Merino Base Layer Crew Top - Women's$125.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFryd Base Layer Pants - Women's$40.73Save 25% - 32%compared to  $55.00 - $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Icebreaker260 Tech Base Layer Leggings - Women's$61.83 - $125.00Underwear Weight:HeavyweightSize Type:Regular, Plus
- Kari TraaSilja Half-Zip 2.0 Base Layer Top - Women's$83.93Save 30%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular
- SpraywayEffra Leggings Base Layer Bottoms - Women's$29.73Save 40%compared to  $49.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis Base Layer Leggings - Women's$61.83Save 50%compared to  $125.00Underwear Weight:MidweightSize Type:Regular
- PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Women's$99.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaSval Base Layer Pants - Women's$49.73Save 28%compared to  $70.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Terramar3.0 Thermawool Base Layer Tights - Women's$44.73Save 36%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men's$115.00Underwear Weight:MidweightSize Type:Regular
- Sale Ends Apr 5ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Women's$60.73Save 62%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Women's$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's$49.93 - $115.00Underwear Weight:HeavyweightSize Type:Regular
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's$63.73Save 35%compared to  $99.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Mock Neck Base Layer Top - Women'sNew arrival$104.73Save 25%compared to  $140.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Arc'teryxRho Hybrid Insulated Base Layer Bottoms - Women'sTop Rated$143.73Save 20%compared to  $180.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$56.83 - $110.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 260 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's$147.93Save 20%compared to  $185.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaAlma Base Layer Pants - Women's$90.00Underwear Weight:UltralightweightSize Type:Regular
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's Plus Sizes$68.83 - $125.00Underwear Weight:MidweightSize Type:Plus
- IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Stripe Crew Base Layer Top - Men's$50.00Underwear Weight:LightweightSize Type:Regular, Big
- Wild RyeBassett LITE Base Layer Leggings - Women's$43.83Save 50%compared to  $89.00Underwear Weight:LightweightSize Type:Regular, Plus
- IcebreakerSiren Sweetheart Long Underwear Top - Women's$85.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$89.73Save 30%compared to  $130.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's$110.00Underwear Weight:HeavyweightSize Type:Regular
- SpraywayEffra Jacket Base Layer Top - Women's$42.73Save 34%compared to  $64.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Icebreaker150 Anatomica Crewe Base Layer Top - Men's$75.00Underwear Weight:LightweightSize Type:Regular
- CraftCORE Dry Active Comfort Base Layer Top - Women's$39.73Save 38%compared to  $64.95Underwear Weight:MidweightSize Type:RegularREI OUTLET
211–240 of 333 products
Sort: Best Match