The 3M 7600 Series Full Facepiece Respirator has a double-flange sealing area made from flexible medical-grade silicone to provide a soft, secure, comfortable fit and optimum seal. Its five-strap harness and chin support add to the comfort and fit. Nose cup reduces dead-air space and channels exhaled breath. Anti-scratch polycarbonate lens provides a 200� field of vision and a downward view for sight in all directions. Speech diaphragm helps you be heard clearly. To help reduce the complexity of respiratory protection compliance, the respirator can be adapted to PAPR and SAR with appropriate breathing tube and cartridge.