Product Description Spalding NBA Neverflat Competitive Outdoor Basketball: is the first ball with Pressure Retention Technologies Amazon.com Product Description The first ever basketball to employ Spalding s Pressure Retention Technologies, the Spalding Never Flat outdoor basketball is the only ball guaranteed to stay fully inflated for at least one year--10 times longer than traditional basketballs. The Never Flat ball is equipped with a new membrane technology that tightens the natural pores in the bladder. The exclusive technology relies on proprietary Nitroflate molecules that are injected into the ball. The molecules form a protective barrier against air seepage, in effect repelling air molecules that might otherwise escape.p The ball further prevents leakage with its specially designed valve, which includes a cap that eliminates leaks and keeps dirt out. The Never Flat basketball measures 29.5 inches in diameter, although a 28.5-inch version is available.p
