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Midweight Base Layers Bottoms
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- HalfdaysHallie Midweight Merino Base Layer Leggings - Women'sTop Rated$64.83 - $130.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Women's$250.00Underwear 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
- Icebreaker200 Sonebula Leggings - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:BigREI OUTLET
- IcebreakerMerino 200 Oasis High-Rise Base Layer Leggings - Women's$130.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker260 Tech High-Rise Base Layer Leggings - Women'sTop Rated$125.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'Top Rated$65.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit AS Merino Base Layer Bottoms - Men's$125.00Underwear Weight:MidweightSize Type:Regular, Big
- Kari TraaRose Light High-Waisted Base Layer Pants - Women's$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Pants - Men's$56.73Save 29%compared to  $80.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Base Layer Pants - Women's$56.83Save 50%compared to  $115.00Underwear Weight:MidweightSize Type:Regular
- The North FaceDotKnit Thermal Base Layer Set - Kids'$80.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Active Base Layer Bottoms - Men's$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- The North FaceDotKnit Thermal Base Layer Set - Kids'New arrival$51.73Save 26%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- ObermeyerComfy Cozy Cargo Base-Layer Set - Kids'$49.73Save 27%compared to  $69.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Deux par DeuxThermal Underwear Base Layer Set - Kids'$35.83Save 50%compared to  $72.00Underwear Weight:MidweightSize Type:Regular
- TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Joggers - Women's$51.73Save 35%compared to  $80.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Hot ChillysOriginals Solid Base Layer Pants - Kids'$34.73Save 26%compared to  $47.50Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Ortovox230 Competition Short Base Layer Pants - Men's$90.00Underwear Weight:MidweightSize Type:Regular, Big
- Hot ChillysOriginals Print Base Layer Pants - Kids'$39.73Save 27%compared to  $55.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- ArtilectFlatiron 185 Base Layer Leggings - Women's$76.73Save 52%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar3.0 Thermawool Base Layer Tights - Women's$44.73Save 36%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Ortovox230 Competition Long Base Layer Pants - Men's$100.00Underwear Weight:MidweightSize Type:Regular, Big
- Arc'teryxRho LT Base Layer Bottoms - Men's$79.73Save 20%compared to  $100.00Underwear Weight:MidweightSize Type:BigREI OUTLET
- Icebreaker200 Oasis Base Layer Leggings - Kids'$29.83Save 50%compared to  $60.00Underwear Weight:MidweightSize Type:Regular
- Wild RyeBassett Base Layer Leggings - Women's$56.83Save 50%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, Plus
- BurtonMidweight X Base Layer Pants - Women's$36.83Save 50%compared to  $74.95Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Base Layer Leggings - Women's$61.83Save 50%compared to  $125.00Underwear Weight:MidweightSize Type:Regular
- StioBasis PeakWool Midweight Base Layer Tights - Men's$149.00Add to cart to see priceUnderwear Weight:MidweightSize Type:Big
- StioBasisPeak Wool Midweight Base Layer Tights - Women's$149.00Add to cart to see priceUnderwear Weight:MidweightSize Type:Regular
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