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Underwear
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- Arms of Andes300 Lightweight Alpaca Wool 3/4 Base Layer Leggings - Men's$54.83Save 50%compared to  $110.00Underwear Weight:LightweightSize Type:Regular
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$64.83 - $69.83Save 50%compared to  $130.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Big
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women'sTop Rated$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaEmbla Wool Base Layer T-Shirt - Women's$80.00Underwear Weight:UltralightweightSize Type:Regular
- ArtilectFlatiron 185 Base Layer Leggings - Women's$76.73Save 52%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaFryd Base Layer Pants - Women's$31.83 - $60.00Underwear Weight:MidweightSize Type:Regular
- SpraywayEffra Hoody Base Layer Top - Women's$49.73Save 28%compared to  $69.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's$120.00 - $130.00Underwear Weight:LightweightSize Type:Regular, Big
- Wild RyeBassett LITE Raglan Base Layer Top - Women's$109.00Underwear Weight:LightweightSize Type:Regular, Plus
- Arc'teryxRho SV Base Layer Bottoms - Men's$120.00Underwear Weight:HeavyweightSize Type:Regular, Big
- SENIQWool Sculpt Merino Base Layer Leggings - Women's$99.93 - $128.00Underwear Weight:HeavyweightSize Type:Regular
- Helly HansenLIFA Merino Midweight 2-in-1 Graphic Half-Zip Base Layer Top - Women's$79.93Save 33%compared to  $120.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenGraphic Lifa Merino Base Layer Set - Kids'$74.73Save 32%compared to  $110.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women's$28.73Save 42%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'Top Rated$44.93Save 30%compared to  $65.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFryd Long-Sleeve Base Layer Top - Women's$49.73Save 23%compared to  $65.00Underwear Weight:LightweightSize Type:PlusREI OUTLET
- Free CountryForce Grid Fleece Base Layer Bottoms - Men's$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- SENIQWool Sculpt Merino Mock-Neck Long-Sleeve Base Layer Shirt - Women's$99.93 - $128.00Underwear Weight:HeavyweightSize Type:Regular
- Arc'teryxKyanite Base Layer Bottoms - Women'sTop Rated$96.73Save 19%compared to  $120.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Ortovox230 Competition Short Base Layer Pants - Men's$90.00Underwear Weight:MidweightSize Type:Regular, Big
- Wild RyeBassett LITE Base Layer Leggings - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- Kari TraaAlma T-Shirt - Women's$80.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaFryd Base Layer Pants - Women's$40.73Save 32%compared to  $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- ArtilectFlatiron 185 Quarter-Zip Base Layer Top - Women's$87.73Save 45%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- REI Co-opMidweight Base Layer Bottoms - Toddlers'Top Rated$24.95Underwear Weight:MidweightSize Type:Regular
- Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- Wild RyeBassett Half-Zip Base Layer Top - Women's$139.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$79.93 - $110.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFaith Half-Zip Base Layer Top - Women's$86.73Save 27%compared to  $120.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Kari TraaEdith Base Layer Pants - Women's$74.73Save 25%compared to  $100.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
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