The MX-6 Earmuff 6130 features an exclusive waffled cup foam for superior NRR protection.The cushion-ribbed headband provides cool comfort all day long and the non-slip wire makes adjustments easy. The large cup openings are designed to fit most ear sizes. The MX-6 is easy to wear and have a sharp look. It is recommended to routinely wash your earmuff with mild soap and water. The foam liner should be allowed to air dry before reinserting into the earcups.