S T A Y- C O O L W I C K I N G S T R E T C H F L A T L O C K S E A M S F O R C O M F O R T R E F L E C T I V E D E T A I L S 5.2-ounce 88/12 poly/spandex with stay-cool wicking technology O G I O heat transfer label for tag-free comfort Elastic locker loop inside neck Black coil zipper with locking pull and black reflective zipper garage Black reflective O Endurance heat transfer bar on back right shoulder Black reflective O heat transfer on left hem