3M Peltor Optime 101 Over-the-Head Earmuffs, Hearing Conservation H7A (Pack of 1) Earmuffs recommended for TWA noise exposures up to 101 dBA Stainless steel headband distributes weight for low pressure fit Earcup pivot points tilt for comfort that adjusts to individual wearers Noise Reduction Rating (NRR) 27 decibels Earcups with liquid and foam filled cushions offer comfort for long wear and optimum seal