Scan tapered foam ear plugs made from soft energy absorbing polymer foam which compresses and then expands for a perfect fit in the ear canal reduces sound levels to the ear drum while maintaining aural contact snr 33d b single number rating snr the number of decibels reduced by the product easy insertion and removal 6 pairs in 3 re sealable containers ech with 2 pairs of ear plugsa conforms to en352 22002