Electrically insulated (dielectric) wire headband on model X5A. Earcups tilt for optimum comfort and efficiency. Twin headband design helps reduce heat buildup with good fit and balance. Wire headband offers comfortable pressure during prolonged usage. Very high attenuation earmuffs recommended for high-noise exposure applications. Despite larger earcups, product is lightweight with excellent balance and comfort. Newly-designed spacer improves attenuation without excess bulk or weight. NRR 31 dB† — highest of any earmuff on the market.