I don't know man, I demo'd a dry suit for a dive in icy water. I only lasted 30 minutes and I couldn't feel my toes or fingers. Not to mention, I had to hold my reg in my mouth by hand because I had no feeling left in my face / mouth. I just don't get how people can dive for any legth of time in those conditions?
Dang Doc, I would love to come work for you with all the goodies you get your guys...you hiring lol.
What?He doesn't like the heaters. Dives without them.