I bought these bags to put in the back of my snowmobile to keep maps and my manuels in and they work ok for that but completely leak when they get wet. I took them rafting and the small one snorkeling and they didn't work at all. There is a hole with a string wrapped through it that is not sealed at all. The velcro is top notch and I don't think the bag would leak through the opening but through the hole the string runs through it leaks bad. No way to fix it either.