Half Facepiece Respirator 7500 SeriesAdvanced silicone construction provides enhanced comfort and long-lasting durability. Wearer-friendly design ensures a firm-seal fit, while putting less pressure on your face. Effectively filters gases, vapors and particulates. Cool Flow™ Valve helps reduce heat and humidity buildup. Dual-mode harness allows you to keep the mask on in a dropdown position. Respirator Type: Half-Face Mask.