Newer breathable wader have a chest strap, which you can practically swim in them. For mine, with the class 3 PFD on, I can literally swim to shore from 500ft away, with less than 1/2 gal of water got into my chest wader to my groin area. The Simmon waders practically have a seal tight chest strap, and a waist strap, in which if you can spare a bit to get the small auto inflate PFD designed for boaters, you're practically air tight from chest to toes. I'm a strong swimmer, but I don't leave things up to chance when I'm in cold water during the winter, as my float decides to spring a leak in the middle of the night.
