EXTREME DURABILITY : Engineered to retain shape and prevent cracking, even after thousands of hits 5X STRONGER : Lab tested to last 5X longer than traditional plastic practice balls LIMITED FLIGHT : Designed to flex on impact to prevent cracking and reduce travel distance MULTI-USE : These balls are perfect for sports training, outdoor games, pet training and more OFFICIAL SIZE : These balls are constructed at official 9.0" size to give your games a more authentic feel