Seallines are a must have for all kayakers and canoeists. I went to a camp where just about everybody there is using to sealline to keep their personal gear dry on river trips and boundary water trips. I never heard one complaint or story about a broken sealline. They are simple to use and are always reliable. Also, I HAVE heard about broken sea-to-summit dry bags. There is nothing worse than a faulty personal bag and a WET SLEEPING BAG on a trip so stick with sealline.