PNR Aviation / Helicopter Headset. Soft and wide sealing Ear Pads filled with high-density foam to offer optimum sealing and low pressure. Molded cord for exceptional pull and flexibility as standard. Noise-canceling electret microphone with amplifier. Noise Reduction Rating (NRR): 24Db. Articulating flex boom for perfect microphone placement. Articulating Fulcrum on Earpads for maximum comfort. Ribbed extra soft foam head pad & high-density foam windsock for mic for wind noise prevention.