The Eberlestock BirdBag utility bag is an easy way to mount 1700 cubic inches of additional capacity on your Eberlestock pack. It's made of black nylon mesh with gray nylon, 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 or the Slingshot, the bag is great for lighter loads of meat or upland game. For heavier loads on these packs, we recommend adding a cross-lashing of supplemental accessory straps (such as our ACSL 36" straps).