Stretch fabric features stay-cool wicking technology and flatlock seams for comfort. Made from 5.2-ounce, 88/12 poly/spandex with OGIO heat transfer label for carefree tag-free living. Also sports an elastic locker loop inside neck, a black reflective zipper garage, and a black coil zipper with locking pull. Black reflective O Endurance heat transfer bar on back right shoulder with reflective O heat transfer on left hem.