A friend of mine when he was 8yrs old watched his dad drown because of waders. While trout fishing a fast moving mountain stream he lost his footing. He did what he should've by staying on his back and keeping his feet pointed down stream until he would reach calmer water. The stream bed consisted of flat layers of rock. He went feet first under one of these layers,and of course underwater,that dead ended as most due. Of course the waders added who knows how much weight thus keeping him from even having a chance of getting out.