Liberty Durashell Full Brim Hard Hat w/Ratchet Suspension is high density polyethylene construction. It has a low profile design with pillowed brow pad & top ribbon pad for comfort. The Durashell™ suspension is designed for easier adjustment. The PE double layered crown strap suspensions are replaceable and washable. Vertical height adjustment for a customized fit. Universal accessory slots fit for cap mounted ear muffs and chin straps.