MSA Tan Skullgard Hard Hat with Staz-On Suspension and Full Brim 454664 Skullgard helmets have been tested to radiant heat loads producing temperatures up to, but not exceeding, 350F. ANSI/CSA Type I Compliant, Protects from vertical impacts and penetrations ANSI/ISEA Z89.1-2014 (Class G) Compliant, provides dielectric protection up to 2,200 volts. Equipped with Staz-On suspension system which provides superior comfort and a semi-custom fit Standard Size, Fits from 6 12" to 8"