Approved for use in NFHS baseball Rawlings R100-H1 High School Baseballs are expertly constructed for the highest performance on the field. These high school baseballs feature a cushioned cork center surrounded by 15 percent wool windings a full-grain leather cover and Core Bond adhesive for reliable long-lasting use. Patented Superstitch high seam technology offers an improved grip on the ball while pitching and fielding. These high school baseballs also feature advanced Extra Innings Technology lasting up to 15 percent longer than other baseballs while maintaining the same great consistency and moisture protection youve come to expect from Rawlings. *vs. other baseballs