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Polyester Base Layers
(107 products)Products (107)
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- Terramar2.0 Cloud Nine Midweight Performance Base Layer Scoop Shirt - Women's$33.73Save 25%compared to  $45.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Free CountryForce Grid Fleece Base Layer Top - Women's$34.73Save 36%compared to  $55.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Terramar2.0 Cloud Nine Midweight Performance Thermal Turtleneck - Women's$35.73Save 25%compared to  $48.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaFryd Base Layer Pants - Women's$32.73 - $37.73Save 37% - 40%compared to  $55.00 - $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- CraftCORE Dry Active Comfort Base Layer Top - Men's$39.73Save 38%compared to  $64.95Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Arc'teryxRho Base Layer Hoody - Women'sTop Rated$96.73Save 19%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men'sNew arrival$112.73Save 19%compared to  $140.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- Free CountryMicrotech Heat Cocaber Base Layer Bottoms - Women's$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Sale Ends May 26Kari TraaLilja Base Layer Pants - Women's$45.73Save 30%compared to  $66.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- SpraywayEffra Jacket Base Layer Top - Women's$46.73Save 28%compared to  $64.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Arc'teryxRho LT Base Layer Bottoms - Men'sNew arrival$79.73Save 20%compared to  $100.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Sale Ends May 26Kari TraaLilja Long-Sleeve Base Layer Top - Women's$45.73Save 30%compared to  $66.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Arc'teryxRho Base Layer Bottoms - Women'sNew arrival$79.73Save 20%compared to  $100.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Terramar2.0 Cloud Nine Midweight Base Layer Capri Pants - Women's$28.73Save 28%compared to  $40.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- TerramarC-Suite Fusion Thermal Pants - Women's$46.73Save 28%compared to  $65.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Free CountryMicrotech Heat Cocaber Base Layer Top - Women's$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's$74.73Save 24%compared to  $99.00Underwear 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
- CraftActive Intensity Base Layer Pants - Women's$31.73Save 42%compared to  $54.95Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arc'teryxRho Boot Cut Base Layer Bottoms - Women'sNew arrival$72.73Save 19%compared to  $90.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Arc'teryxRho Heavyweight Base Layer Bottoms - Men'sTop Rated$96.73Save 19%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- Arc'teryxKyanite Base Layer Bottoms - Women'sNew arrival$96.73Save 19%compared to  $120.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Joggers - Women's$56.73Save 29%compared to  $80.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SaxxRoast Master Midweight Base Layer Bottoms - Men's$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Free CountryCloud Knit Base Layer Bottoms - Women's$31.73Save 29%compared to  $45.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's$46.73Save 28%compared to  $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Base Layer Bottoms - Infants'$21.73Save 25%compared to  $29.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SpraywayEffra Leggings Base Layer Bottoms - Women's$36.73Save 26%compared to  $49.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SpraywayEffra Hoody Base Layer Top - Women's$49.73Save 28%compared to  $69.95Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
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