Jackson Safety F4XP Series Premium Replacement Crown and Headgear for Face Shields Replacement crown and headgear for F400XP series faceshield. 370 Speed Dial™ ratcheting headgear system provides easy grab-easy turn adjustments for superior comfort and fit. Patented Qwik-Fit swivel headband adjusts suspension for superior comfort. Extended crown is built with premium high-impact rated material for optimum coverage and safety Pack of 1