3M Promask Full Facepiece Reusable Respirator FM3-L is our large sized, multi-function full-face mask designed to provide durable and comfortable protection against a wide range of respiratory hazards. Use as a negative-pressure single-Filter mask or as a face piece for a powered air respirator, 3M Promask is compatible with the 3M Versaflo TR-600E, 3M Versaflo TR-800E, 3M PF-600E powered air systems as well as the 3M DT Series of Filters including particulate, gas and vapour and combination Filters, Visor provides a good field of view, and the front-mounted speech diaphragm helps improve communication, Sweat port helps to improve user comfort during long periods of use, Five-point rubber head harness helps provide a secure, stable fit, and the side-fitting Filter port and clear inner mask for improved forwards and downwards vision, Filter does not interfere with front-mounted speech diaphragm to aid in easy communication CE certified EN 12942 Class TM3 EN 136 Class 3.