In the gym on the track or out on the practice field keep your cool as you train with the nike dri fit miler training tank top in blackthis mens sleeveless vest top is made from 100 polyester material and features nike dri fit technology which is designed to help keep the wearer feeling cooler drier and more refreshed when in action by wicking sweat away from the skin and quickly evaporatingstay cool and refreshed as you workout and train by pulling on the nike dri fit miler training tank