Metal heat is a material that keeps you warm by blocking cold air while regulating your body temperature, thanks to micro perforations that evacuate moisture while providing good breathability and being comfortable. It is also designed with stretch mesh panels on the sides for breathability, a lower back hole that allows access to jersey pockets, a hook-and-loop strap on the back to keep everything in place and reflective accents. for more visibility. Not to mention that it is easy to store and extremely light! With the Metal Heat Jacket, never be caught off guard by the cold again!