Facepiece can be used as a twin-cartridge air-purifying respirator that provides full-face respiratory protection. Facepiece with 1/4 turn quick disconnect features speed-on head harness & has nose cup that minimizes lens fogging in low temperature or high humidity conditions. It features unique lens design that renders a high level of downward & peripheral vision. It features large adjustment tabs for easy doffing & donning. It features speaking diaphragm that enhances communication & offers easy speech flow.