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Men's Underwear: Deals
(86 products)Products (86)
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- SmartwoolIntraknit Thermal Merino Base Layer Hoodie - Men'sNew arrival$134.73Save 25%compared to  $180.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Mountain HardwearUp First Tech Fleece Base Layer Bottoms - Men's$74.73Save 25%compared to  $100.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- PatagoniaCapilene Thermal Weight Crewneck Base Layer Top - Men's$73.73Save 25%compared to  $99.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's$77.83 - $130.00Underwear Weight:LightweightSize Type:Regular, Big
- StanceGood Times Boxer Briefs - Men's - Package of 2$26.73Save 40%compared to  $45.00Size Type:RegularREI OUTLET
- SmartwoolWind Boxer Briefs - Men's$44.73Save 25%compared to  $60.00Size Type:BigREI OUTLET
- StanceCompression Nylon Boxer Briefs - Men's$26.73Save 31%compared to  $39.00Size Type:RegularREI OUTLET
- Free CountryCloud Knit Base Layer Bottoms - Men's$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:BigREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men's$59.93Save 39%compared to  $99.00Underwear Weight:LightweightSize Type:Regular
- Arc'teryxRho Insulated 3/4 Base Layer Bottoms - Men'sTop Rated$159.73Save 20%compared to  $200.00Underwear Weight:HeavyweightSize Type:Big, RegularREI OUTLET
- Free CountryCloud Knit Crewneck Base Layer Top - Men's$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- PatagoniaCapilene Thermal Weight Zip-Neck Top - Men's$53.83 - $115.00Underwear Weight:HeavyweightSize Type:Regular
- IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Free CountryForce Grid Fleece Base Layer Bottoms - Men's$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- SaxxVibe Xtra Soft Comfort Boxer Briefs - Men's$24.73Save 27%compared to  $34.00Size Type:RegularREI OUTLET
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$64.83 - $69.83Save 50%compared to  $130.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Big
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:HeavyweightSize Type:BigREI OUTLET
- Icebreaker125 ZoneKnit Merino Thermal Leggings - Men's$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- StanceCurren Wholester Boxer Briefs - Men's$19.73Save 43%compared to  $35.00Size Type:RegularREI OUTLET
- Sale Ends Apr 5StancePalmer Boxer Briefs - Men's$9.73Save 61%compared to  $25.00Size Type:RegularREI OUTLET
- Royal RobbinsReadyDry Crew T-Shirt - Men's$26.73Save 33%compared to  $40.00REI OUTLET
- StanceCurren Boxer Briefs - Men's$17.73Save 40%compared to  $30.00Size Type:RegularREI OUTLET
- SmartwoolIntraknit Active Base Layer Bottoms - Men's$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- StanceNavy Mash Wholester Boxer Briefs - Men's$19.73Save 43%compared to  $35.00Size Type:RegularREI OUTLET
- Free CountryForce Grid Fleece Base Layer Top - Men'sTop Rated$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Crew Base Layer Top - Kids'$28.73Save 26%compared to  $39.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$119.73Save 25%compared to  $160.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Icebreaker200 Sonebula Leggings - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:BigREI OUTLET
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