to tell you the truth, its a life saver, but i dont wear one on the rocks. there so many possiblities of danger on the rocks. Usually its a sneaker wave that will smash you down and break bones, oir just plain falling on the rocks.. All in all, its a matter of chioce........hell the only thing that would make you safe on the rocks is if your felt soled football pads ur wearing could inflate into a boat if you fell in.....i guess what im sayin is being confident on the rocks is key, if you try to second guess a step it will be too late....so wear what u need to be confident!