This half facepiece reusable respirator 7500 Series uses advanced silicone material to help provide comfortable and durable respiratory protection. The 3M Cool Flow Valve helps make breathing easier and can reduces heat and moisture build-up for cool, dry comfort. Benefits Half facepiece ultimate reusable respirator Advanced silicone material for increased comfort and durability 3M Cool Flow Valve for cool, dry comfort Dual-mode head harness for standard or drop-down mode (Filters not Included)