Delivers optimal attenuation across all frequencies. A patented baseplate chamber and high-tech non-woven layer inside the ear cushion manage the flow of air and controls how sound reaches the ear. The result is better, more consistent overall attenuation for almost all industrial noise environments. Robust steel headband for demanding requirements especially in difficult working conditions. Slip-on ear seals can be replaced quickly and easily. High level of comfort during long wear times thanks to minimum pressure on the head.