3M™ Speedglas™ Supplied air (SA) respiratory system. Includes V-100 Vortex air-cooling valve, belt, breathing tube, and complete 9100 MP helmet assembly, and 9100 XXi ADF. Includes wide-view protective visor for grinding and setup. Lightweight valve can lower temperature of air entering headpiece by up to 50°F (28°C). Meets ANSI Z89.1 -2009 requirements for Type 1 Class G hardhats.