SkullGuard Full Brim Hats feature heavy-duty construction for use in steel mills and other heavy industries where high temperatures are common. SkullGuard Hard Hats meet or exceed the applicable requirements for a Type I helmet (top impact) as outlined in ANSI Z89.1 2003, Class G electrical-low voltage) OSHA standards. This version of the SkullGuard Hard Hats includes a rubber rim that we apply to the hat in-house that you can not find anywhere else. This adds an extra layer of protection and provents chips and scratches. This protective edge looks very clean and improves the lifespan of your new hard hat.