Instead of adding bells and whistles, we removed things-resulting in scientifically researched, body-mapped ventilation zones for our Women's Ultralight T-Shirt. With wicking, antimicrobial fabric you'll stay cool and dry while out on the trails, even while wearing a running vesta. Features Varying degrees of mesh knit into high to mid sweat zones Low profile, chafe free seams Wicking, antimicrobial fabric Specifications Weight: 2.2 oz / 61 g Materials Body mapped mesh (antimicrobial) | Ultimate Direction Women's Ultralight T-Shirt in Basalt Size Small