I have a home on Roatan, Honduras and do a lot of diving. I have a dry bag with the roll up tie off seal similar to this but was getting tired of carrying it on the handle. I just returned from my first trip down with the bag and used it for beach visits, diving, and snorkeling. I really wanted a bag that had backpack straps. This was the perfect bag!! When you are trying to stay dry the pocket in the back is great for cell phone, wallet, etc and easy access. When you know you are getting wet everything goes inside and stays dry with no concerns. I even wore it while snorkeling (actually swimming to the next beach). Everything was dry when I got there. Took out my towel and dry clothes and nobody was the wiser that I didnt walk the trip. Carries a good size GoPro case, towel, change of clothes, and a large bottle of water. Looks small but carries a lot. I am looking to get 2-3 more for when friends come visit.