Hard hat attached hearing protection with Noise Reduction Rating (NRR) of 31 dB for high noise exposures * Fits a wide range of industrial safety hard hats, including 3M(TM) H-700 Series Hard Hats (sold separately) * Attaches directly to many hard hats without an adapter * Earcups tilt to ensure a customized fit and comfort for individual users * Adjustable earcups may be placed in three positions: 1) Usage position 2) Stand-by position, or 3) Storage position