3M  Medium Silicone Half Mask Reusable Ultimate Series 7500 Facepiece comes with 3M  Cool Flow? Exhalation Valve which includes a unique valve design that helps for Easy breathing and helps to reduce heat and moisture buildup in the Facepiece. It includes a unique adjustment design that helps to reduce pressure points on the face for unsurpassed comfort and head harness design that adjusts easily for wearing the respirator in either traditional or drop down modes. Facepiece are made from soft, resilient silicone and heat resistant plastics that provides a softer feel on the face. These are applicable in abatement, painting, welding, battery manufacturing, construction, utilities, mining, pharmaceutical, smelting and chemical handling. Misuse may result in sickness or death.