Re: Immersion Suits
I've worn them - had to be able to put them on within 3 minutes, which is not easy and takes practice.
They aren't really one size fits all, they are some sizes fit most. The do seal up quiet nicely when put on correctly and sealed at face, neck and wrist. I had to jump into a pool and navigate 50 yards from one end to the other (on your back is the only way to really do so) - When I got out my uniform coveralls were still mostly dry (collar got wet). I was in the pool for about 20 minutes.
That's certainly not the same as a wind blown big wave environment.
I'd wear one to save my life, but not to lounge on deck.
I have a shorty wet suit with 2+2 (float and insulation). I don't wear that for fun either.
Lessons learned are opportunities earned.