3M Reusable Full Face Masks have a large polycarbonate lens and soft, elastomeric facepiece. The 3M Bayonet Connection System enables you to connect to a broad range of 3M twin lightweight filters. Features a 3M Cool Flow Valve and four-strap suspension. Offers protection against gases, vapours and particulates, and is designed with the 3M Bayonet Connection System so you can connect to a broad range of twin, lightweight filters, depending on your individual needs. The 3M Cool Flow Valve helps reduce heat and moisture build-up and provides less restriction to your breathing.