Nesco 4656 Auto Darkening Solar Powered Welding Helmet with WWII Bomber Graphics Durable, light weight material is corrosion resistant and flame retardant Complies with DIN, ISO, EN safety standards and ANSI Z87.1-2003 standards Special turnover headband mechanism allows for greater comfort and reduces fatigue Outside sensitivity adjustments provides clear vision both prior and during welding Variable shades from DIN 9 to DIN 13