This is a roomy 24x30 with pleated bottom for storing even the bulkiest of clothing. The bag is made of a washable, heavy-duty coated nylon rip-stop fabric and has a back-to-back inner and outer layer to ensure it is not only waterproof but as airtight as possible. It has two large storage compartments for binoculars, flashlights, gutting gloves, knives, folding saws, etc. There is also a large mesh storage compartment for the included 14x17 changing mat. The mat has a raised outer lip and ridges to help prevent your socks from getting wet while changing your clothes. The mat is made with a special anti-freeze additive to keep the rubber from getting stiff in cold weather.