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<< It consisted of a vest (very tight!), pants (very tight!), and a shirt (very tight!)to go over the vest.
There is a special strap hanging from the front shirt (it defaultly[<--not even a word i think] hangs over your "hung area") that crosses over your crotch area to some hook on the back of your shirt. >>
I don't know what that is, but it's definitely not a wetsuit....at least not any like I've seen or worn (I'm also a surfer)
What was the vest like? Did was it made out of some sort of buoyant foam?
I have seen 2-piece wet suits, though.
But I've never worn a wetsuit buoyant enough that you could float.
Believe me....wet suit or not, I wouldn't shove off (I actually surf on a kayak these days) without my PFD (life jacket). The wetsuit just ain't gonna do it. >>
The "strap" you are all talking about is called a "beaver tail" . It is found on cold water wetsuit tops that are part of a two-piece combination suit. You would put on the bottom portion that covers the legs and chest, and is called a "farmer john". You put on the jacket piece, zip it up, and pull the "beaver tail" that is attatched to the top, through your crotch and secure it to the front of the top. It covers the groin and helps to hold the top in place. I have worn them many times.
I used to teach on the Northern CA coast in water from 45-55 degrees year round. Dry suits are the way to go with water that cold, but a properly layered 7mm suit with hood, booties, and gloves will do the trick. I used to wear a hooded vest, one piece 7mm oneil, booties, and gloves. I had to wear ~25-30lbs (with all my scuba gear on) just to be neutrally buoyant, had to exhale to sink.