Where can i buy...?

this thing that u wrap around ur stomach and it make u sweat more. it's made out of this elastic that u can wrap around urself lots times..i really really want to know where i can catch one...please.Where can i buy...?
My friend and I used to use saran wrap. It is a heck of a lot cheaper. You are essentially sweating out wet, however the minute you start drinking water it will be right vertebrae. Please don't do it you can get a over-hasty as well...TRUST ME!
Just sweat it out the innate way, by doing some cardio.
i've see them on tv and did research on them yes they make you swet but not gain muscel