3M™ PELTOR™ X Series Hygiene Kit XY4 The X-Series earmuffs are 3M’s latest advancement in hearing conservation. New technologies in comfort, design and protection all come together in this groundbreaking earmuff line. The X4A utilizes a newly designed spacer, specially formulated foam liners and innovative ear cushions to help improve attenuation. This lightweight, lower-profile earmuff helps with compatibility with other personal protective equipment and is designed for protection against moderate-to-high level industrial noise and other loud sounds. It features an electrically insulated wire headband, often referred to as “dielectric”. The wire headband offers consistent pressure over prolonged wearing periods Earcup pivot points tilt for optimum comfort and efficiency Adapter clips hold microphones next to earmuffs during testing *The NRR may overestimate the hearing protection provided during typical use.