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- Icebreaker260 Tech Vertex Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$150.00Underwear Weight:HeavyweightSize Type:Regular
- IcebreakerMerino 200 Oasis High-Rise Base Layer Leggings - Women's$115.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho LT Base Layer Bottoms - Men's$100.00Underwear Weight:LightweightSize Type:Regular, Big
- CraftCore Dry Active Comfort Base Layer Pants - Women's$29.73Save 33%compared to  $44.95Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SENIQWool Sculpt Merino Base Layer Leggings - Women's$128.00Underwear Weight:HeavyweightSize Type:Regular
- Arc'teryxKyanite Base Layer Bottoms - Women'sTop Rated$120.00Underwear Weight:HeavyweightSize Type:Regular, Plus
- Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men's$250.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$89.73Save 30%compared to  $130.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes$79.95Underwear Weight:LightweightSize Type:Plus
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'Top Rated$65.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho Merino Wool Base Layer Bottoms - Men's$120.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho SV Base Layer Bottoms - Men's$120.00Underwear Weight:HeavyweightSize Type:Regular, Big
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'$51.73Save 26%compared to  $70.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker300 MerinoFine Polar Long-Sleeve Roll-Neck Thermal Base Layer Top - Men'sNew arrival$220.00Underwear Weight:HeavyweightSize Type:Regular, Big
- Free CountryMicrotech Heat Cocarber Base Layer Bottoms - Women's$39.73Save 33%compared to  $60.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Free CountryCloud Knit Base Layer Bottoms - Men's$26.73Save 33%compared to  $40.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- BurtonMidweight Base Layer Pants - Women's$19.83Save 69%compared to  $64.95Underwear Weight:MidweightSize Type:Regular
- SmartwoolThermal Merino Rib Turtleneck Base Layer Top - Women's$130.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Snow Day Base Layer Top - Women'sTop Rated$120.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to  $115.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Kari TraaElse Half-Zip Base Layer Top - Women's$76.73Save 30%compared to  $110.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker260 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women'sTop Rated$119.73Save 27%compared to  $165.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenHH Durawool Crew Long-Sleeve Base Layer Top - Men'sNew arrival$64.73Save 28%compared to  $90.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Terramar2.0 Cloud Nine Midweight Base Layer Capri Pants - Women's$28.73Save 28%compared to  $40.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Max Merino Base Layer Pattern Hoodie - Women's$114.73Save 30%compared to  $165.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Size Type:RegularREI OUTLET
- Kari TraaRose Light Base Layer Top - Women's$81.73Save 25%compared to  $110.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis+ Long-Sleeve Half-Zip Thermal Base Layer Hoodie - Men'sNew arrival$150.00Underwear Weight:MidweightSize Type:Regular, Big
- Kari TraaAlma Hood Base Layer Top - Women's$59.73Save 25%compared to  $80.00Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- CraftCore Dry Active Comfort Base Layer Pants - Men's$32.73Save 34%compared to  $49.95Members use code OUTGIFT for an extra 20% off at REI Outlet, today only.Underwear Weight:MidweightSize Type:RegularREI OUTLET
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