Watershed Animas Backpack. The Animas backpack offers plenty of room for a couple days worth of gear, along with the convenience of removable backpack straps. The Animas backpack is ideal for storage of extra boxes of shells, high end camera, dry gloves, and snacks for those longer day hunts. The Animas Backpack is totally waterproof and extremely durable. The Animas Backpack is our “shallow water solution” for keeping your gear safe and dry while in the field.