The Rival Double Compartment Shell Bag by Allen is made using a heavy cotton canvas material and can hold up to two boxes of 2-3/4 inch 12 Gauge shotgun shells side-by-side. Use the inside compartment to hold your shotgun shells and put your empty hulls in the outside pocket. When the hull compartment is full, slide the bottom of the pocket opens with the zipper too, quickly dump them out. The Rival Double Compartment Shotgun Shell Bag comes with a 2-inch wide webbed belt that adjusts up to 52-inches and has a large side release buckle.