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- Black DiamondSolution 150 Merino Base Layer Bottoms - Women'sTop Rated$79.73Save 27%compared to  $110.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenHH LIFA Crew Base Layer Top - Women's$50.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$150.00Underwear Weight:MidweightSize Type:Regular, Plus
- Wild RyeBassett Half-Zip Base Layer Top - Women's$66.83Save 50%compared to  $135.00Underwear Weight:MidweightSize Type:Regular
- 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
- Helly HansenHH Durawool Crew Long-Sleeve Shirt - Women's$64.73Save 28%compared to  $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaAlma T-Shirt - Women's$80.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaSara Half-Zip Base Layer Top - Women's$79.73Save 27%compared to  $110.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$89.73Save 33%compared to  $135.00Underwear Weight:HeavyweightSize Type:PlusREI OUTLET
- Kari TraaVoss Cashmere Mix Half-Zip Base Layer Top - Women's$116.73Save 35%compared to  $180.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- RHONEApres Houndstooth Seamless Base Layer Leggings - Women's$88.93Save 30%compared to  $128.00Underwear Weight:LightweightSize Type:Regular
- Wild RyeBassett Base Layer Leggings - Women's$56.83Save 50%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, Plus
- Icebreaker200 Oasis Base Layer Leggings - Kids'$29.83Save 50%compared to  $60.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's$90.00Underwear Weight:LightweightSize Type:Regular
- SmartwoolClassic All-Season Merino Base Layer Long-Sleeve Shirt - Women's$66.73Save 25%compared to  $90.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$150.00 - $155.00Underwear Weight:MidweightSize Type:Regular
- The North FaceDotKnit Thermal Base Layer Set - Kids'$80.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Women'sTop Rated$77.93Save 25%compared to  $105.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino Base Layer Leggings - Women's$109.73Save 45%compared to  $200.00Size Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis Base Layer Leggings - Kids'$60.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerMerino 260 Tech Thermal Base Layer Leggings - Women'sTop Rated$93.73Save 25%compared to  $125.00Underwear Weight:HeavyweightSize Type:PlusREI OUTLET
- Deux par DeuxThermal Underwear Base Layer Set - Kids'$35.83Save 50%compared to  $72.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolClassic Thermal Merino Lettuce Edge Base Layer Bottoms - Women's$82.73Save 28%compared to  $115.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 Vertex Long-Sleeve Crewe Natural Shades Base Layer Top - Women's$89.73Save 35%compared to  $140.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Thermal Base Layer Leggings - Women's$86.73Save 30%compared to  $125.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
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