I feel like this is worth mentioning. I have the HEAT. It's kind of a combo of both and mid range in pricing. Arms and shoulders are the same as Hyperfreak and the rest of the suit is TB3. They only come in back zip with smoothie panels back and chest. I really love the suit. Very warm and flexible. Easy on and off. My only complaint is the zipper flushes a little bit. If it had an interior panel with the weep holes at the bottom, that would be awesome.