Versatile and durable, your gear will stay dry inside these round bottom dry bags, even in adverse conditions. Shut out water by rolling down the top a few times and snapping the side release buckles together. Bags are constructed of extra heavy-duty vinyl/polyester tri-laminate with RF-welded seams. It?s quick and easy to find items inside the clear bags, made of durable waterproof 19 oz. vinyl with RF-welded seams. Great for power boats, sailboards, personal watercraft, kayaks, canoes, camping, motorcycles, ATV?s, snowmobiles and car top luggage racks too !