The NIKE Vapor Strike 24/7 Football Ball is an official size and weight football suitable for training purposes. Made of composite leather, this ball is designed for durability and performance on the football field. With a weight of 11 oz and a size of 11 inches, this Nike Vapor ball is ideal for high school football players looking for a reliable and authentic training ball. The association with the National Federation of State High School Associations (NFHS) ensures that this ball meets the standards required for official games.