Crown is made of ABS injection molded resin with 5-position locking cam system for added impact resistance (headgear is to be used as secondary protection only). Adjustable headband accommodates hat sizes from 6 1/2 to 7 3/4. Large washable cotton sweatband for better fit and durability. Large ratchet handle is easy to adjust for optimum fit. The clear polycarbonate replaceable face shield is .040 inches thick and measures 8" x 15.5". Meets or exceeds ANSI Z87.1-2003 high impact standards.