Well I did my first two ice dive training dives with my new Bare Nex Gen and the Bare CT200 undergarment. I stayed pretty warm, except for my hands and feet. My feet and hands were already cold before the dives from standing on the ice for a couple hours while setting up and tending line for other divers. Generally I was quite pleaed with the the ds and the CT200. Not a hint of a leak and my core stayed toasty.