Nike Elite Championship Airlock Basketball - Men's The Nike Elite Championship Basketball features Airlock Technology that holds exact air pressure longer than closest competition. Adjust the air pressure exactly where you want it. Precision feel with precise, steady air pressure week after week. Game-Dry composite leather/micro-perforated cover helps keep sweat from collecting on the surface of the ball for a sure handle and ultra-soft touch all game long. Soft-touch, woven microfiber backing delivers a soft, indoor feel with deep-pebble grip. Shooter-preferred wide channels help your fingers find a groove. NFHS approved for high school play. For indoor use. 70% rubber/15% thermoplastic polyurethane/15% synthetic leather. Sz: 29.5".