Easton E100P Backpack Easton Baseball worked to create an all new line of bags that cater to baseball players. Part of that line is the Easton E100P Backpack, featuring a smaller size that's perfect for youth players. Outside of the main storage area are two bat sleeves, a padded back panel, and cushioned shoulder straps. Made from 600-denier polyester, the E100P also includes an external pocket for personal items. 16" x 12" x 7.5". 100% polyester. Imported.