DURABLE LIGHTWEIGHT DESIGN, SUPER SIMPLE BALANCED STRUCTURE THIS IS COMFORTABLE FOR ALL DAY USEHIGH-DEFINITION OPTICAL TECHNOLOGY FOR HIGH QUALITY COLOR VISIONULTRA-HIGH PERFORMANCE FILTERS PROTECT AGAINST UV & IR RAYSFULL CONTROL OF SHADE AND TIME-DELAY ADJUSTMENTS SUITABLE FOR ALL KINDS OF HIGH AND LOW CURRENT WELDINGENERGY EFFICIENT, ENVIRONMENT FRIENDLY, 3 YEAR REPLACEABLE BATTERY LIFE EXPECTANCY