3M™ Peltor™ Hygiene Kit for Headsets HYX4/37283(AAD) Features The X-Series headsets by 3M feature the latest in hearing protection technology. This innovative headset series combines comfort, design, and protection. The X4A model uses newly designed insert pieces, special foam liners, and innovative ear cushions to improve attenuation. This lightweight, low-profile headset helps ensure compatibility with other personal protective equipment, and is designed to protect against medium to high industrial noise and other loud sounds. (bul)Replaceable ear cushions and foam liners. (bul)Noise Reduction Rating (NRR) 27 dB. CSA Class AL. NRR may overestimate the actual protection provided in typical use. 3M recommends using NRR's 50% attenuation for estimating provided hearing protection. Innovatively Easy™ Hearing Protection Solutions. Extends the life of earplugs. Provides good functionality and hygiene. Prevents discomfort when wearing headsets. Package includes 2x foam inserts and 2x sealing rings.