The BirdBag utility bag is an easy way to mount 1900 cubic inches of additional capacity on your Eberlestock pack. It has a nylon mesh front designed to let meat cool, and a solid nylon back to keep your pack clean, and comes in a mesh stuff sack. When combined with packs with large compression straps, such as the Gunslinger, the BirdBag will carry a significant amount of meat. For packs without external compression straps, such as the X1, the bag is great for lighter loads of meat or upland game.