Rawlings Official AAU Baseballs - Men's AAU coaches, look no further for the Rawlings Official AAU Baseball. This official AAU baseball uses Rawlings exclusive EIT (Extra Innings Technology) to greatly increase the life and performance of the ball. EIT technology uses a thin layer of synthetic polymer under the full grain leather cover to maintain shape and block moisture from entering the wool winding of the ball. The raised seam stitching improves grip and accelerates development. Sold by the dozen.