This is a cost effective system used by foundries, aluminum plants, mines, chemical plants, refineries, auto manufacturers, metal working and fabrications. Performance proven with a constant and powerful supply of breathable air from a clean air source, this Helmet offers protection from airborne contaminates including hexavalent chromium applications, flying debris, sparks, chemical and molten metal splashes. The welding shield flips allowing user to grind and clean metal looking through clear ANSI face shield. Large #10 lens included. Complies with ANSI Z89.1 Type 1 Class G for head protection; ANSI Z87.1+ for face-shield/eye protection. NIOSH approved. This shield comes with a Vortex Cooler, Vortex Tubes are an effective, low cost solution to respiratory cooling needs. With no moving parts, a vortex tube spins compressed air to separate the air into cold and hot air streams by forcing the compressed air through a generation chamber which spins the air centrifugally along the inner walls at a high rate of speed toward the control valve.