Abstract: A backpack to be carried on the back of user that includes an adjustable rib protector, a hydration system, a tool pack with storage pockets and two extra storage compartments that can be used to carry other miscellaneous items. The backpack can be used in two ways. It can be attached to a chest protector that is commonly used for off road bike riding, or it can be used without the chest protector with two shoulder straps to provide a conventional backpack. The conventional backpack can be used by an off road bike user or vehicle user or with the backpack reconfigured to be used as a backpack for hiking or the like. The backpack is configured in such a manner that the various storage compartments can easily be removed and replaced by different storage compartments for various backpack requirements.