MOS Reference: ANSI/ISEA Z89.1 Type I Class E hard hat rated for top-impact protection up to 20,000 volts electrical insulation. Six-point ratchet suspension system absorbs and distributes impact energy while providing a comfortable, adjustable fit. Accessory slots accept face shields, earmuffs, and chin straps. Rain trough channels water away from the face. UV-stabilized HDPE shell resists degradation from prolonged sun exposure.