3M H4

3M™ Pinlock Headgear H4
KEY FEATURES :
– Pinlock closing adjusts from size 6-1/2″ to 8″ in 1/8″ increments.
– High-strength thermoplastic crown.
– Provides impact resistance over a wide range of temperatures.
– No snaps, bands, or cams. Easy window replacement.
– Five position crown strap for additional support and comfort.
Standard :
Meets ANSI Z87.1-2003