This product fits Compatible with original BOB only, does not fit BOB XL. - Body Opponent Bag only. Since Century introduced the original BOB Body Opponent Bag back in in 1998, and, later, the BOB XL, we've gotten several requests for a BOB with arms. We decided to test out the old saying “the customer is always right” and gave our Research and Development team the task of creating a product that would give BOB arms. They came up with this jacket, which fits on BOB training dummies.