The striking shape of the future and the most significant design change in football helmets in over twenty years. The Riddell Revolution Pro-Line Helmet was designed after a four-year study to address the causes of mild traumatic brain injury. Each Revolution Pro-Line full-sized helmet is the actual helmet NFL teams wear on the field, featuring updates in the jaw area, padding and facemask attachment system. Engineered for proper weight balance redistribution. Helmets are made in a standard size large by the manufacturer. Not intended for competitive play.