3M Peltor X4 Earmuffs, X4P5E are lightweight, electrically insulated earmuffs designed to protect hearing from mid-level industrial noise and other loud sounds. These earmuffs are made of non-conductive material and feature a universal mounting attachment that fits most hard hats, with ear cup pivot points that tilt to cradle and cushion ears for comfort. Ear cushions and foam liners are replaceable using the 3M Peltor Hygiene Kit for Earmuffs, HYX4.