The Pinnacle 8/6 semi dry Merino II is one of the warmest suits
Laboratory tests have proven that Merino II lined neoprene is approximately 46% more thermally efficient than conventional neoprenes, meaning that the Extreme has the thermal efficiency of a suit that is nearly 12mm thick, yet with all the mobility and reduced buoyancy of a much thinner suit
Truly the warmest semi-dry or wetsuit that money can buy
8mm Titanium body and 6mm Titanium arms and legs for superior mobility
Merino lining for increased warmth and comfort
Titanium material for superior warmth
Attached 6mm Merino lined hood for maximum warmth
10MM Spine & Kidney pad to keep the chill out
Molded rubber shoulder pads designed to grip the buoyancy compensator and reduce shifting
Kevlar knee pads provide exceptional grip and durability
One-way flow vent at the top of the hood to minimize air trapping
Horizontal front zip provides a large entry that closes effortlessly
Zippered ankles provide comfortable fit, tight seal
Wrist, ankle and neck seals helps keep cold out
Drysuit zipper keeps all water from entering through the chest area
Here is a link to the size chart. Keep in mind itis easier to cut a suit down to fit than add material:
http://www.scuba.com/resources/sizechart/pinnacle.htm