These High School baseballs meet all official ABCA (American Baseball Coaches Association) specifications. The R100 baseball has Rawlings exclusive EIT (Extra Innings Technology). EIT baseballs contain a patented thin layer of polymer just under the cover which resists the damaging effects of moisture on durability and performance and plays a key role in maintaining the ball's firmness. Rawlings R100 baseballs have a full grain leather cover for added durability, patented Superstitch high seam technology for strength, consistency and durability, 85% wool windings, a cushioned cork center and Core Bond technology to ensure the cover remains securely in place permanently.These baseballs carry the ABCA stamp.