Instead of adding bells and whistles, we removed things-resulting in scientifically researched, body-mapped ventilation zones. Features Varying degrees of mesh knit into high to mid sweat zones Low profile, chafe free seams Wicking, antimicrobial fabric Specifications Weight: 3.0 oz / 85 g Materials Body mapped mesh (antimicrobial) | Ultimate Direction Men's Ultralight T-Shirt in Tidal Size Large