Liberty DuraWear polyethylene full brim hard hat. High density polyethylene construction. Vented feature improves air circulation and reduces heat. Universal accessory slots fit for cap mounted ear muffs and chin straps. PE double layers crown strap suspensions are replaceable and washable. Rain trough on sides and back of helmet channel moisture away. DuraShell suspension is designed for easier adjustment by the wearers. Low-Profile design with pillowed brow pad and top ribbon pad for comfort. Vertical height adjustment.