Mcdavid Hexpad Sleeveless Body Shirt with Hexpad Shoulders nylon HexPad Sleeveless body shirt pro style sleeveless compression shirt with Hexpads protecting the shoulders Hexpad conforms to and stretches with your body for continuous protection Hydravent Moisture Management Technology enhances heat control, comfort, and performance 80%nylon/20% spandex, 5.5 oz. per square yard