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Lightweight Base Layers
(117 products)Products (117)
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- 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
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women'sTop Rated$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaFierce Base Layer Pants - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's$119.00Underwear Weight:LightweightSize Type:Regular, Big
- Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxLana Merino Wool Crew Base Layer Top - Women's$90.00Underwear Weight:LightweightSize Type:Regular, Plus
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's$93.73Save 25%compared to  $125.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Wild RyeBassett LITE Base Layer Leggings - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- Helly HansenLIFA Stripe Crew Base Layer Top - Men'sNew arrival$50.00Underwear Weight:LightweightSize 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
- Sale Ends Mar 23REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall SizesTop Rated$67.39Save 25%compared to  $89.95Underwear Weight:LightweightSize Type:Tall, Big
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's$56.83 - $66.83Save 50%compared to  $115.00 - $135.00Underwear Weight:LightweightSize Type:Regular
- Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's$120.00 - $130.00Underwear Weight:LightweightSize Type:Regular, Big
- Sale Ends Mar 23REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall SizesTop Rated$59.89Save 25%compared to  $79.95Underwear Weight:LightweightSize Type:Tall
- Ortovox185 Rock'N'Wool Short Base Layer Pants - Men's$100.00 - $110.00Underwear Weight:LightweightSize Type:Regular, Big
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Black DiamondSolution 150 Merino Base Layer Crew Top - Women'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize 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
- Free CountryForce Grid Fleece Base Layer Top - Men'sTop Rated$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:BigREI OUTLET
- Sale Ends Mar 23REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes$59.89Save 25%compared to  $79.95Underwear Weight:LightweightSize Type:Tall, Big
- Arc'teryxLana Merino Wool Base Layer Tank Top - Women's$80.00Underwear Weight:LightweightSize Type:Regular, Plus
- Free CountryCloud Knit Base Layer Bottoms - Men's$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:BigREI OUTLET
- Kari TraaSmekker Long-Sleeve Base Layer Top - Women's$89.73Save 25%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- 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
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women's$28.73Save 42%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaLucie Half-Zip Base Layer Top - Women's$66.73Save 25%compared to  $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Wild RyeJane Leggings - Women's$42.73Save 60%compared to  $109.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arc'teryxRho Merino Wool Base Layer Bottoms - Men's$120.00Underwear Weight:LightweightSize Type:Big
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