3M 7500 Series Unique 3M bayonet filter fixing system Uses all of the 3M 2000, 5000 & 6000 Series filters Made of soft silicone for unparalleled wearer comfort Cool Flow valve for easier breathing & reduced heat & moisture build-up Unique head harness & optional drop-down strap design for greater stability & increased level of comfort EN140 / CE marked Filters sold separately Fit Testing: The 3M 7500 series Half Mask is a tight fitting face piece and therefore requires a fit test per wearer before use as per the COSHH regulations 2002.