3M Peltor X2A Over-the-Head Earmuffs, Hearing Conservation ,10 EA/Case 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 X2A is a lightweight, lower-profile earmuff designed for protection against low-to-moderate 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 - Replaceable ear cushions and foam liners (hygiene kit HYX2) - Noise Reduction Rating (NRR)b 24 dB.