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- Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$92.73Save 28%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men'sTop Rated$84.83Save 29%compared to  $120.00Underwear Weight:MidweightSize Type:Big, Regular
- BurtonMidweight X Base Layer Long Neck Hoodie - Women'sTop Rated$44.83Save 50%compared to  $89.95Underwear Weight:MidweightSize Type:Regular
- Kari TraaFaith Half-Zip Base Layer Top - Women's$59.83Save 50%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker125 ZoneKnit Base Layer Leggings - Women's$61.83Save 50%compared to  $125.00Underwear Weight:LightweightSize Type:Regular
- SeirusHeatwave Body Mapped Quarter-Zip Long-Sleeve Base Layer Top - Women's$69.83Save 50%compared to  $140.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's$64.83Save 50%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- BurtonHeavyweight X Base Layer Pants - Women's$49.83Save 50%compared to  $99.95Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaFaith Base Layer Pants - Women's$54.83Save 50%compared to  $110.00Underwear Weight:HeavyweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's$97.93Save 30%compared to  $140.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men'sTop Rated$98.83Save 29%compared to  $140.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Arc'teryxRho Merino Wool Base Layer Bottoms - Men's$96.93Save 19%compared to  $120.00Underwear Weight:LightweightSize Type:Regular, Big
- Wild RyeJane 7/8 Base Layer Leggings - Women's$56.83Save 50%compared to  $115.00Underwear Weight:LightweightSize Type:Regular
- BurtonMidweight Base Layer Crew Top - Women's$31.83Save 50%compared to  $64.95Underwear Weight:MidweightSize Type:Regular
- REI Co-opHeavyweight Merino Base Layer Bottoms - Men's$49.83Save 50%compared to  $99.95Underwear Weight:HeavyweightSize Type:Big, Tall
- HalfdaysJohnson Base Layer Top - Women's$62.93Save 25%compared to  $85.00Underwear Weight:UltralightweightSize Type:Regular, Plus
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's$61.83Save 50%compared to  $125.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaSara Half-Zip Base Layer Top - Women's$54.83Save 50%compared to  $110.00Underwear Weight:HeavyweightSize Type:Regular
- SeirusHeatwave Body Mapped Full-Length Base Layer Bottoms - Women's$59.83Save 50%compared to  $119.95Underwear Weight:MidweightSize Type:Regular
- BurtonMidweight Base Layer Pants - Women's$31.83Save 50%compared to  $64.95Underwear Weight:MidweightSize Type:Regular, Plus
- IcebreakerMerino 200 Oasis Long-Sleeve Base Layer Crew Top - Kids'Top Rated$41.93Save 30%compared to  $60.00Underwear Weight:MidweightSize Type:Regular
- HalfdaysSophia Base Layer Leggings - Women's$62.93Save 25%compared to  $85.00Underwear Weight:LightweightSize Type:Regular, Plus
- Arc'teryxRho Hoody Base Layer Top - Women'sTop Rated$104.93Save 19%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's$98.83Save 29%compared to  $140.00Underwear Weight:MidweightSize Type:Regular, Big
- Kari TraaSara Base Layer Pants - Women's$49.83Save 50%compared to  $100.00Underwear Weight:HeavyweightSize Type:Regular
- REI Co-opMidweight Base Layer Zip-Neck Top - Kids'Top Rated$19.83Save 50%compared to  $39.95Underwear Weight:MidweightSize Type:Regular
- Kari TraaKlara High-Waist Base Layer Pant - Women's$44.83Save 50%compared to  $90.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaSval Long-Sleeve Base Layer Top - Women's$39.83Save 50%compared to  $80.00Underwear Weight:LightweightSize Type:Regular
- SeirusHeatwave All Season Reversible Long-Sleeve Base Layer Top - Women's$36.83Save 50%compared to  $75.00Underwear Weight:LightweightSize Type:Regular
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