This frame works with any MSA full-brim hats and features unique sloped design to help material slide off the frame and out of site. Frame can be used with earmuffs, half-mask respirators and other personal protective equipment. It stays securely on the cap, thanks to the heavy-duty, flat, rubber strap. Replaceable debris control creates tight seal between frame and helmet. The elevated temperature model withstands temps up to 350ºF (176ºC).