I'm for latex seals - but with DC dry gloves attached, not a great challenge...
I can see the argument for a neoprene neck seal though. It would certainly be warmer on entering the water, but I'm not sure that you'd really notice the difference after that.
I can see the argument for a neoprene neck seal though. It would certainly be warmer on entering the water, but I'm not sure that you'd really notice the difference after that.