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- Kari TraaEdith Base Layer Pants - Women's$74.73Save 25%compared to  $100.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Deux par DeuxThermal Underwear Base Layer Set - Toddlers'$49.93Save 30%compared to  $72.00Underwear Weight:MidweightSize Type:Regular
- ArtilectFlatiron 185 Quarter-Zip Base Layer Top - Women's$87.73Save 45%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- 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 HansenVerglas Half-Zip Top - Women's$63.73Save 25%compared to  $85.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaSara Half-Zip Base Layer Top - Women's$79.73Save 27%compared to  $110.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- ObermeyerComfy Cozy Cargo Base-Layer Set - Kids'New arrival$49.73Save 27%compared to  $69.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's$66.73Save 25%compared to  $90.00Underwear Weight:LightweightSize Type:PlusREI OUTLET
- Helly HansenMerino Wool Base Layer Set - Kids'$75.73Save 36%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- CotopaxiLiso Base Layer Top - Men'sTop Rated$44.73Save 31%compared to  $65.00Underwear Weight:MidweightSize Type:BigREI OUTLET
- Kari TraaMalia Half-Zip Base Layer Top - Women's$76.73Save 23%compared to  $100.00Underwear Weight:MidweightSize Type:PlusREI OUTLET
- Kari TraaElse Long-Sleeve Base Layer Top - Women's$69.73Save 30%compared to  $100.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's$84.73Save 26%compared to  $115.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- REI Co-opLightweight Base Layer Bottoms - Toddlers'Top Rated$13.93Save 30%compared to  $19.95Underwear Weight:LightweightSize Type:Regular
- REI Co-opLightweight Crew Base Layer Top - Toddlers'Top Rated$13.93Save 30%compared to  $19.95Underwear Weight:LightweightSize Type:Regular
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