what make?
I have had quite a number of them over the years, two piece, one piece, no piece (shame on me) and at my age and <<ahem>> athletic ability or not, it's two piece all the way now. I have the Salus bibs, which I think are the best I ever tried, and a Canadian Navy surplus top, made by Mustang. But so far I have not had the desire nor the opportunity to try them in water. And I am good with that. And yes, always carry ice picks, "don't leave home without them."
Doug