MSA 454621 Skullgard Protective Hard Hat Front Brim, Staz-on Suspension, Standard Size, Green 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"