VERSATILE SHIELD – 's F4XP Crown can be used interchangeably with all universal pin pattern windows, including over 30 shield windows; Quick-change system ensures fast and efficient window changes WRAPAROUND PROTECTION – Extra large 8" x 15.5" polycarbonate window offers full-coverage from side to front while oversized crown protects from overhead hazards HIGH-IMPACT POLYCARBONATE WINDOW - Durable and clear for maximum visibility and safety in industrial environments, with ABS plastic crown 370 SPEED DIAL HEADGEAR - Adjustable oversized ratcheting knob provides a customized fit on the head and can be adjusted even with gloves on; Quick-Fit rear swivel headband for all-day comfort MEETS STANDARDS - Meets ANSI Z87.1+ high impact and CSA Z94.3 standards