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- 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
- IcebreakerMerino 260 Vertex Long-Sleeve Crewe Natural Shades Base Layer Top - Women's$104.73Save 25%compared to  $140.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Sale Ends Nov 24Kari TraaKaia Base Layer Set - Women's$97.49Save 25%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- Sale Ends Nov 28IcebreakerMerino 200 Oasis Long-Sleeve Crewe Snow Day Base Layer Top - Women'sTop Rated$89.99Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular
- Sale Ends Nov 24Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's$67.49Save 25%compared to  $90.00Underwear Weight:UltralightweightSize Type:Regular
- Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'$32.73Save 34%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker260 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women'sTop Rated$119.73Save 27%compared to  $165.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Sale Ends Nov 24Kari TraaSilja Half-Zip 2.0 Base Layer Top - Women's$89.99Save 25%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaLucie Base Layer Pants - Women's$58.73Save 26%compared to  $80.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Sale Ends Nov 24REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes$48.89Save 30%compared to  $69.95Underwear Weight:LightweightSize Type:Plus
- Sale Ends Nov 24Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'Top Rated$44.99Save 25%compared to  $60.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFierce Base Layer Pants - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's$42.73Save 34%compared to  $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's$65.73Save 45%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Sale Ends Nov 24Kari TraaRose Capri High-Waist Base Layer Bottoms - Women's$82.49Save 25%compared to  $110.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET
- TerramarC-Suite Fusion Thermal Pants - Women's$42.73Save 34%compared to  $65.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaSval Base Layer Pants - Women's$49.73Save 28%compared to  $70.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Sale Ends Dec 8Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$86.19Save 25%compared to  $115.00Underwear Weight:LightweightSize Type:Regular, Plus
- Sale Ends Nov 24Icebreaker260 Tech Thermal Base Layer Leggings - Kids'Top Rated$52.49Save 25%compared to  $70.00Underwear Weight:MidweightSize Type:Regular
- Icebreaker260 ZoneKnit Base Layer Leggings - Women'sTop Rated$119.73Save 27%compared to  $165.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Wild RyeJane Leggings - Women's$64.73Save 40%compared to  $109.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- BurtonMidweight X Base Layer Pants - Women's$36.83Save 50%compared to  $74.95Underwear Weight:MidweightSize Type:Regular
- Sale Ends Dec 8IcebreakerMerino 200 Oasis High-Rise Base Layer Leggings - Women's$86.19Save 25%compared to  $115.00Underwear Weight:MidweightSize Type:Regular
- Sale Ends Nov 28Icebreaker260 Tech Vertex Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$112.49Save 25%compared to  $150.00Underwear Weight:HeavyweightSize Type:Regular
- ArtilectDarkhorse 185 Zoned Base Layer Leggings - Women's$99.73Save 37%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Sale Ends Dec 1SmartwoolClassic Thermal Merino Half-Zip Base Layer Hoodie - Women's$108.69Save 25%compared to  $145.00Size Type:Regular
- Sale Ends Dec 1SmartwoolClassic Thermal Merino Mock Neck Base Layer Top - Women's$104.99Save 25%compared to  $140.00Underwear Weight:MidweightSize Type:Regular
- Sale Ends Nov 28Icebreaker260 Tech Vertex High-Rise Thermal Base Layer Leggings - Women's$112.49Save 25%compared to  $150.00Underwear Weight:HeavyweightSize Type:Regular
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