Geckobrands Waterproof Lightweight Backpack

This bag is super lightweight. I'm not suggesting it could withstand being submerged, but it has kept all items dry while stored underneath seats (with fins, etc...) on many dive trips. It's been tried and true for us.

I keep this in my motorcycle tank bag in case of Florida downpours. Rode from Fort Lauderdale to Orlando with this bag in sporadic thunderstorms and the laptop was fine on arrival. Obviously not meant for submersion but I use it to keep out rain, dust, waves, etc. This thing does the trick.Folds up light and compact too. Just crumple it up.

I was not sure what to expect based on previous reviews. The dimensions also seemed like it was going to be on the smaller size, maybe enough for a towel and small items. That was not the case, the dimensions are deceiving, it is actually a really good size. My daughter is a lifeguard and I bought it for her to take all her to stuff to work in. She has plenty of room for her towel, a change of clothes, makeup bag and a pair of shoes. It seals well once you fold it over and latch it and she even turned it upside down to see if it would come undone and it did not. It keeps all her things nice and dry in the wet locker room and really just an overall great bag. I can see us getting a lot of use out of this for lake trips as well. Super happy with my purchase!