Returns to normal when welding stops with dark to clear adjustments available. Special turnover headband mechanism allows for greater comfort and reduces fatigue. Utilizes high performance solar cells with 2 built-in 3v lithium batteries as power back-up. Complies with DIN, ISO, EN safety standards and ANSI z87.1-2003 standards. Product Features:Durable, lightweight material is corrosion resistant and flame retardantUltra high performance filters protects against UV and IR2.125 x 4 inch viewing areaVariable shades from DIN 9 to DIN 13
