3M Half Facepiece Reusable Respirator 7500 Series is a premium facepiece with a 3M Cool Flow Valve, a soft silicone faceseal for comfort, and a dual-mode head harness for either standard or drop-down mode. 3M 7500 Series is NIOSH-approved with a wide variety of 3M bayonet-style filters and cartridges.3M Half Facepiece Reusable Respirator 7500 Series has a soft silicone faceseal for premium comfort. The 7500 Series features the 3M Cool Flow Valve to help release warm and moist exhaled breath from inside the respirator. An exhalation valve cover helps direct exhaled breath and moisture downward. The adjustable head cradle and straps work together to offer a personalized fit. The drop-down feature allows the respirator to be taken off in a non-contaminated environment without having to remove a hard hat. The 3M Half Facepiece Reusable Respirator 7500 Series can help reduce exposure to a broad range of gases, vapors and particulates when used with approved 3M bayonet-style filters and/or cartridges. When properly fitted and used with approved 3M filters and/or cartridges, this half facepiece helps provide respiratory protection for concentrations up to 10 times the OSHA permissible exposure limit (PEL). Connects with all 3M 2000, 5000 and 7000 Series filters and 6000 Series cartridges and can be used with 3M Powered and Supplied Air Systems for increased convenience and flexibility including TR-600, TR-800, and Dual Airline. The 7500 Series offers replacement spare parts to help maintain the right level of comfort and protection when parts become worn or damaged. Available in three sizes: small, medium and large.