The M18 Silencer earmuff is a SLC80 = 30dB rating, Class 5 earmuff. It may be used in noise up to 110 db(A) assuming an 85dB(A) criterion. A lower criterion may require a higher protector class. The soft headband padding is ribbed, providing enahnced cushioning and breathability for all day wearing comfort. The M18 Silencer muffs can also pivot on the central axis, enabling you to find that perfect fit. The muffs are able to slide along the metal wishbones, allowing you to have that ideal seal around your ears. The M18 Silencer can collapse when not in use. This helps to keep out foreign particles, protects the inner padding and provides compact storage.