This half facepiece was designed with the wearer in mind. Its soft sealing surface, along with a uniquely designed, 3M Cool Flow Exhalation Valve, enhances wearer comfort and face fit. It's made from a durable silicone and can be used with any of the 3M Filters and Cartridges, Series 2000, 5000, 6000 and 7093. Features and Benefits , New cool flow exhalation valve designed to help make breathing easier; also helps to reduce heat and moisture build up in mask. , Durable and heat resistant, made from soft resilient silicone and heat-resistant. , New soft seal design; advanced silicone material provides a softer feel on the face. , Unique adjustments design helps to reduce tension and pressure points on the face providing unsurpassed comfort and helps reduce ring around the nose. , Dual-mode head harness design adjust easily allowing user the option of wearing the respirator in either the traditional, or drop down mode.