Electrical insulation: Suitable for a wide range of applications. Powerful mounting arms: Balance, durability and flexibility. Checkable tight fit: Fit can be checked with the 3M E-A-Rfit Dual-Ear validation system. Convenient storage: Storage of the hearing protector with earmuffs clicked in and out is possible. Shells made of ABS plastic: rigid, robust, impact-resistant. Wide, soft foam padding: ensures a high level of comfort and effective sealing. Protection against noise. Dielectrically insulated. Replaceable ear pads and insulating inserts (hygiene set). Work efficiently and effectively. Low maintenance costs, easy to service.