It is really simple to use, all you do is put the items you don't want to get wet in it, roll it up, and buckle it shut. Perfect for cell phone, maps, cloths, etc. Knowing that the items you close up in the bag will stay dry is awesome! Great for water sports or just a lazy day on a river. Being able to get the perfect size is also a great plus.
myself and my friends find the product is perfect for our weekend kayaking flat water trips, large enough for the cell phone, keys and a light lunch, sun block ect. yet it rolls up to small for storage. If there was a small window strip running down the bag it would make for a faster retreival of items.