Covered with water-resistant pro rubber for a better grip and durability, this Champion Sports Junior Size Rubber Football is great for practice games, training and recreational play inside or out. The rubber football has a two-ply butyl bladder to maintain its shape after each pass, and can take a beating on the field, in the park or the gym.. Durable water-resistant pro rubber cover stands up to regular use indoors and outdoors. 2-Ply butyl bladder for superior air retention. Playable on all surface. Junior size. Pack of 2. 5+ years. Grade K+