FXR Atmosphere Boxer Briefs The FXR Atmosphere Base Layers are designed for optimal performance in cool and cold conditions, crafted from a blend of 88 polyester and 12 spandex knit. Their brushed interior enhances comfort and maximizes moisture-wicking efficiency. Featuring tapered cuffs, these base layers minimize bulk for a streamlined fit. Features: 140gsm 88 polyester / 12 spandex knit with brushed interior Moisture-wicking and antimicrobial finish Flat-lock seaming for superior comfort Jacquard elastic waist FXR Warmth Rating Max 1