a Rugged, high profile cups Adjustable headband and ProForm(TM) leather ear cushions a 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 position a Dielectric construction a Suitable for a high noise environment, both in the factory and in your home workshop a Simple height adjustment requires no tools to remain fixed during wear a Snap-in ear cushions make replacement quick and easy