Demolition Derby Backpack RBYHere we have the Demolition Derby Backpack, a tough and unique item for people who crave the excitement of the derby track. This backpack, made with top notch materials and careful attention to detail, is a must have for any roller derby fan. The comfortable shoulder straps and adjustable sizing of the backpack make it suitable for a wide range of users. With its fully cushioned back panel and airy mesh fabric, this vest is pleasant to wear even