New Rawlings Official Training Baseballs Series Level 10 9 Inch White Red Blue 9 inch:White Blue Red Asymmetric design and anatomical strap Navy Blue Metallic Silver Asymmetric design and anatomical strap alignment for the right and left legs optimizes fit Trublock anti roll design creates stability in and out of the blocking position Inner Knee Protection (kip) with zero shock memory foam where catchers need it most 2 piece liner System for customized fit and maximum comfort Exos ventilation System channels hot Air out and cooler Air in 40% polyester Fit Standard Fit Details Reversible Full grain leather cover Rawlings Major League seam Polyurethane medium firm center Official size and weight training ball Full grain leather cover for added durability Polyurethane soft center Rawlings Major League seam