When you focus on getting better, and not just on getting results, success takes care of itself. That is why the Evolution Game Ball is the #1 basketball in High Schools across the country. Every part from the moisture-wicking composite cover to the laid in channels provide exceptional performance for those who aren't satisfied with being satisfied. 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.