Round Bottom Outfitter Stow bags, are constructed with an 18 oz. PVC coated Polyester top material, and 32 oz. boat fabric on the bottom. The bottom has a grommet tab that will allow you to hang your bag upside down so the water will drain off of the bag and away from the closure. This is our most popular bag for personal items used while on the river. Things like sun screen, rain coats, wet suits, and even first aid kits.