Electrically insulated (dielectric) wire headband on model X4A. 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. Lightweight earmuff recommended for moderate to high-noise exposure applications. Low-profile cup design for improved compatibility with other personal protective equipment (PPE). Newly-designed spacer improves attenuation without excess bulk or weight.