MSA Safety Works Hard Hats meet all applicable requirements of the American National Standards Institute ANSI Z89.1-2003. Type I, Classes E (Electrical) and G (General).; This top-selling hard hat features an easy-to-use, fast-to-adjust ratchet suspension. The hard hat has a lightweight, rugged polyethylene hard hat shell, that is balanced on the head by the continuous loop nylon fabric suspension straps. Featuring MSA s distinctive V on top, this MSA Hard Hat with Ratchet Suspension is extremely popular among the hard hat using pros. .