The all new wilson staff dx3 urethane offers a extremely soft feel high spin perfromance and maximum distance from the tee with a extremely low compression rate of 55 the wilson staff dx3 uthethane is the worlds softest urethane ball these balls offer a 3 piece construction with premium cast urethane that gives tour perfomance spin for amazing perfromance around the green finaly these balls use a firm hpf mantle layer for maximum velocity and distance off the tee