A sleeve or grip for use on a ball bat or other sporting-good implement includes a low-friction inner surface and a longitudinal slit that facilitates its positioning on, and removal from, a handle of the implement. The grip is rotatable about the handle so that a user's hand may move into an optimal position during a swing. The grip may be readily removable from the implement so that, after a swing, it stays with the user, as opposed to remaining on the implement.