a Rugged high profile cups Adjustable headband and ProForm(TM) leather ear cushionsa Hard hat adaptor fits most hard hats (may not be suitable for wide-brim hard hats)a Hard hat adaptor pivots and locks in the up positiona Dielectric constructiona Suitable for a high noise environment both in the factory and in your home workshopa Simple height adjustment requires no tools to remain fixed during weara Snap-in ear cushions make replacement quick and easy