Wilson A1010 Pro Flat Seem Baseball (1 Dozen) Flat Seams: The most aerodynamic Wilson baseball, these balls fly further, giving both pitchers and hitters the feeling of playing in the Pros Red Cushioned Cork: Allows the baseball to stay more energized during bat/ball collision Dura-Core Technology: helps the ball retain hardness 15% better than the competition Grade A Full Grain Leather with Premium Gray and White Wool Collegiate and High School play, NFHS Approved