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