Designed for outdoor use, the Champion Sports Rubber Volleyball is constructed with a rubber cover, which ensures the ball will withstand regular use on playgrounds or sports fields. With a nylon-wound butyl bladder, this volleyball boasts superior air retention, keeping it inflated after consistent use on hard volleyball courts. Pack of 3 volleyballs.. Official size and weight volleyball. Rubber cover designed for outdoor use. Nylon-wound butyl bladder for exceptional air retention. White. Pack of 3. 5+ years. Grade K+