3M Half Facepiece Reusable Respirator 7501 helps provide protection against particulates and a wide variety of gasses and vapours. When properly fitted and used with approved 3M Cartridges and Filters, this respirator (commonly referred to as a mask) helps provide respiratory protection at concentrations up to 10 times the Permissible Exposure Limit (PEL). This respirator uses an advanced silicone material that provides a softer feel on the face. A unique adjustment design helps reduce pressure points on the face for even more comfort. A 3M Cool Flow Valve helps make breathing easier and can offer cooler and drier comfort for the wearer. Head harness may be adjusted to drop down when not in active use (allows respirator to be removed without taking off hard hat). The exhalation valve cover directs exhaled breath and moisture downward while helping protect the valve area from debris while also making for easier cleaning.