I surf in Ireland. I bought this on sale. I have lower back issues & the idea of heat in my wetsuit was appealing. First off I don't get continuous heat. It turns itself on & off as my ribs hit it. Secondly it bruises my ribs. Thirdly it rises up as I put my chest zip wetsuit on. A swimsuit type style would keep it in place where I need it most, my lower back. I bought the xs & it's a good fit for a woman. Overall it does take a lot of the misery out of cold water surfing so that's a good thing.