For some reason wetsuit makers do not make suits to fit me. I have a large chest and relatively narrow waist. (46c, 35w). As a result I really hate wetsuits. This suit came about as close to fitting me as anything I have tried. It's stretchiness was such that it was even almost pleasant to wear even topside. In the water it did everything it was supposed to do. I found myself well insulated and comfortable. I made three dives in this suit a few weeks ago. Surface water temp was about 74deg. There were two thermoclines at 15ft and at 30ft. Bottom temp was about 66 degrees. It took a couple minutes to acclimatize to the second thermocline but after that I was very comfortable at that temp in this shorty suit. I did not need anything more. Now having written the above I will say that I am probably more tolerant of cold water than many people. I do think it is safe to say that this suit will suffice for anyone when diving in moderately cool water.