Best wetsuit I've ever had. The Definition 5mm wetsuit is awesome. Keeps me pretty dry and very warm. Love the zippered ankles and wrists, with the extra lining at those places.

The two-piece suit quite often overlapping the long johns as well, so even more watertight. Generally one-pieces suit don't have a hood on it, so you're going to lose a lot of heat out of your head and also going to let more water in down the back.

Check if there is any area where the wetsuit restricts your movement or feels uncomfortable. No excessive stretching around the neck and wrists. The collar should be snug without being too tight, while the wrist seals should sit smoothly against your skin without feeling too tight or loose.