All-in-One, which serves as a 3.5 oz pack cover, gear hammock, hanging food bag, waterbag, tarp, groundcloth, sleeping bag foot cover, cover for the end of a hammock to protect from the spray that comes under the tarp, etc. It's so versatile that I think it's definitely earned a place in my pack. UPDATE: JRB now manufactures Jeff's Gear Hammock and Pack Cover!