Please pay with STRIPE. Our prefered payment provider. Made of microfiber composite leather, the Wilson Evolution official high-school game basketball is approved for use by the National Federation of High School Associations (NFHS). The ball is equipped with Wilson's Cushion Core Technology, which features low-density sponge and butyl rubber materials that combine to encourage a softer feel. The Evolution's high-definition pebble surface, meanwhile, gives you a better grip--and thus a better performance--on the court. Other features include a three-ply nylon thread winding, a thermal-molded rubber bladder, and an Air Tite butyl rubber valve and housing. The Evolution game basketball is the official size and weight.