High density polyethylene construction. Meets ANSI Z89.1-2009 Standard, Type I, Class C, G & E. Low-profile design with pillowed brow pad and top ribbon pad for comfort. Durashell suspension is designed for easier adjustment by the wearers. Rain trough on sides and back of helmet channel moisture away. PE double layers crown strap suspensions are replaceable and washable. Vertical height adjustment. Universal accessory slot fit for cap mounted ear muffs and chin straps. Available with 4 and 6 point nylon suspension-pinlock and ratchet styles.