Pinlock nylon suspension can be adjusted and locks for a secure, hassle free fit. Ratchet nylon suspension is easy to adjust allowing wearer to modify fit while wearing the hard hat. Lightweight polyethylene with impact-absorbing ridges. Three vertical adjustments for proper crown height positioning. Universal accessory slots fit most cap mounted ear muffs. Soft brow band is washable and reusable. Meets ANSI Z89.1-2003 Standard, Type 1, Class G & E.