From the Manufacturer
ArcOne CF-X540V-0500 Clean Air Flow Vision Shell With Xtreme Variable 5x4 Filter is an auto-darkening helmet option for the Clean Air Flow PAPR system. The Vision helmet features a narrow design, making it the perfect helmet for tool cribs and job shops. The streamlined narrow face makes it ideal for working in tight locations. The Vision helmet comes equipped with a Perma-Loc ratchet head gear and moisture absorbent sweat band. The Xtreme Variable 5x4 filter features a 40 percent larger viewing area than most filters on the market today. The Xtreme Variable 5x4 filter has a sensitivity, delay and grind mode, as well as four independent sensors. The dark state is 10 & 11, light state is 3.