The Wilson A1010 PRO is made with premium gray wool and Dura-Core technology that makes the ball retain hardness 15% better than the competition. Formed to withstand impact and give you the game changing performance you need. The red cushioned cork gives the baseball the ability to keep its shape and firmness. This allows for better pop when coming off the bat. The cover is made of Grade A full grain leather. The flat seams make the most aerodynamic baseball, they fly further giving both pitchers and hitters the feeling of playing in the Pros.