So what do you do when you need to pack a bag and keep it dry? Well, you may want to check out the Westwater waterproof backpack from Watershed. As a class five submersible backpack, the Westwater will stay dry to depths of three hundred feet. Using Watershed's patented ZipDry closure which uses overlapping radio frequency welds to fuse seams and Kryptothane fabric with five times the abrasion resistance of PVC fabric, the Westwater is ready for whatever punishment you might mete out. It never cracks, fades, or loses flexibility, even in cold weather, and has a simple clean style. So whether it's adventuring out in the Amazon or out in your backyard by the swimming pool, you'll be ready.