A bag, such as a backpack, is provided having first and second closure mechanisms. The backpack includes an opening at the top end of the bag, with the first and the second closure mechanisms configured to selectively secure and close the opening. The first closure mechanism is configured to couple a front side and a back side of the backpack at the top end to partially close the opening and form a first slot and a second slot. The second closure mechanism is configured to partially or completely secure the opening by securing a first edge of the opening to a second edge of the opening to close each slot. The second closure mechanism includes a first and a second releasable fastener which may be zippers. The first and second slots are alignable with one or more interior sections to form first and second equipment storage compartments within the backpack.