Ok so i went looking and these look like the best thing to wear if you want to avoid drowning. They look like they'd be extra useful when offshore at night or on a breaking bar and you need to swim a few kilometres against a strong current.

I know they'd be cold in the conditions most people sail in, but why would you wear something that inhibited swimming like bib/braces or boots or heaven forbid an offshore smock.

www.rebelsport.com.au/p/speedo-mens-endurance-jammer-black-14-64388301.html