State-of-the-art features help provide unsurpassed comfort. 3M Cool Flow exhalation valve – new valve design helps make breathing easier, and helps reduce heat and moisture buildup in the facepiece. Dual-mode head harness – unique head harness design adjusts easily so user has the option of wearing the respirator in either traditional or drop-down mode. New soft seal design – advanced silicone material provides a softer feel on the face. Unique adjustment design helps reduce tension and pressure points on the face for unsurpassed comfort.