School Smart Soccer Balls, Assorted Colors, Size 4 (2 X Pack of 6) The School Smart soccer balls are built with high quality and durability to last through years of wear and tear. Provides a great resource for your physical education or playground supplies. Features permanent molded-in color panels for enhanced roundness Natural rubber exterior for durability, and nylon winding around a butyl rubber bladder for shape retention The ball is constructed to standard specifications for soccer balls Suitable for middle and grade school grade levels