Io - the only bits of rubber in modern dry suites are the extremity seals, these days everything thing else is synthetic gortex shell, and the rubber bits afore referred arent of course actually rubber! Still not the most sexy outfit.
I need a week in a dry suite once - now that is a real experience.
Water for me = liferaft, jackets, portable epirb, the epirb in the aircraft is not much good when it sinks and you have drifted 3 miles with the current - i will take my chances after that.