Easy breathing, comfortable and durable repiratory protection: The 3M Half Facepiece Reusable Respirator 7500 Series offers the following features: Advanced silicone material for increased comfort and greater durability. Proprietary 3M CoolFlow Valve helps make breathing easier and can offer cooler and drier comfort. Dual-mode head harness that adjusts easily so users can wear the respirator in either standard or drop-down mode. Solid exhalation valve cover which directs exhaled breath and moisture downward while helping protect the valve area from debris while also making for easier cleaning. For use with 3M Cartridges 6000 Series; 3M Filters 2000, 2200, 7000 or 5000 Series; or 3M Dual Airline Systems against a variety of gases, vapors and particulate hazards according to NIOSH approvals. Head harness assembly and spare parts available. Comes with reclosable storage bag