Moldex M-Series Earmuffs are flexible and lightweight with an appealing stylish design Seamless workmanship make these earmuffs robust and durable with grip points for easy on-head adjustment They also feature a smooth sliding mechanism for size adjustment The extra soft foam air cushions and low contact pressure ensure the M-Series are extremely comfortable Available in a range of protection levels M4 SNR 31dB M5 SNR 34dB and M6 SNR 35dB