I have a shorty wetsuit made by GUL (www.gul.com) and it has a layer of titanium in the body. It works well for temps that I am willing to go into which is nothing to brag about: I stop sailing when it hits the upper 60's fahrenheit. We call that winter in central Florida.

I bought the suit online from Murray's clearance page (I am not affiliated; just passing info). I think it retailed for $159 and I got it for $49.

Look at the "Steamer" suits if you go to gul.com. You can e-mail them for more information. They're very helpful.

One word of warning from experience: It's easy to become too chilled too quickly in temps that you thought would be safe. If you begin to go hypothermic your brain begins to play tricks on you. Sail with a buddy or at least have some communication with someone ashore.