When I was younger,I was fishing the upper Sauk up around Barlow pass. It was opening day and the river still had snow melt in it. It was clear and fast. To make a long story short,I was wearing a pair of rubber chest waders. And being that I was smarter than the river I tried to cross where the river was shallow. About knee deep. Slipped on a rock and fell down. The river carried me down stream quite aways. It scared the hell out of me and I threw those waders away. Never wore rubber waders again. Now I use neoprene and they are skin tight as I am big around the middle. And I don't cross where I don't know the bottom. Jim S.