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Underwear
(562 products)Products (562)
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- SmartwoolIntraknit Merino 3/4 Base Layer Bottoms - Women's$120.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFloke Base Layer Pants - Women's$64.73Save 35%compared to  $100.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's$75.00Underwear Weight:LightweightSize Type:Regular
- StanceSanta Rips Boxer Briefs - Men's$22.73Save 35%compared to  $35.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Helly HansenHH Durawool T-Shirt - Women's$80.00Underwear Weight:LightweightSize Type:Regular
- StanceLucias Floral Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Icebreaker150 Anatomica Crewe Base Layer Top - Men's$75.00Underwear Weight:LightweightSize Type:Regular, Big
- Helly HansenLIFA Merino Midweight Balaclava Hoodie - Women'sNew arrival$106.73Save 28%compared to  $150.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- StanceKahala Wholester Boxer Briefs - Men's$24.73Save 29%compared to  $35.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- ArtilectFlatiron 185 Crew Base Layer Top - Men's$70.00Save 50% - 56%compared to  $140.00 - $160.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- The North FaceSummit Series Pro 120 Base Layer Tights - Men'sTop Rated$100.00Underwear Weight:UltralightweightSize Type:Regular, Big
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Hoodie - Men'sNew arrival$119.00Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolClassic Thermal Merino Mock Neck Base Layer Top - Women'sNew arrival$140.00Underwear Weight:MidweightSize Type:Regular
- ArtilectFlatiron 185 Quarter-Zip Base Layer Top - Women's$99.73Save 37%compared to  $160.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Half-Zip Base Layer Top - Women's$109.00Underwear Weight:LightweightSize Type:Regular, Plus
- Helly HansenHH LIFA Base Layer Set - Kids'$70.00Underwear Weight:UltralightweightSize Type:Regular
- Sale Ends Aug 28ArtilectDarkhorse 185 Zoned Quarter-Zip Base Layer Top - Women's$85.00Save 50%compared to  $170.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- StanceDockerson Boxer Briefs - Men's$19.73Save 34%compared to  $30.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- IcebreakerMerino Long-Sleeve Roll-Neck Base Layer Top - Women's$220.00Underwear Weight:HeavyweightSize Type:Regular
- The North FaceSummit Series Pro 120 Base Layer Tights - Women'sTop Rated$100.00Underwear Weight:UltralightweightSize Type:Regular, Plus
- StanceWebbed Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- Helly HansenOdin Power Stretch Half-Zip Base Layer Top - Women's$88.73Save 40%compared to  $150.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- StanceCasa Playa Boxer Briefs - Men's$19.73Save 26%compared to  $27.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- The North FaceFD Pro 160 Base Layer Crew Top - Women's$70.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$103.73Save 35%compared to  $160.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Ortovox230 Competition Long Base Layer Pants - Men's$100.00Underwear Weight:MidweightSize Type:Regular, Big
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$150.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLIFA Merino Midweight Graphic Base Layer Crew Top - Women's$110.00Underwear Weight:MidweightSize Type:Regular
- StanceRamp Camo Boxer Briefs - Men's$22.73Save 24%compared to  $30.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- StanceBlock It Out Wholester Boxer Briefs - Men's$24.73Save 29%compared to  $35.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
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