3M™ Peltor™ Optime™ II headband headset (H520A), designed for use in noisy environments. They attenuate even very low frequency sounds to maximum levels. Wide and comfortable sealing rings filled with a unique blend of liquid and foam, which simultaneously provide an optimal fit, minimal contact pressure and more room for the ears. The sealing rings have ventilation holes and are coated with a specially developed soft metallic material with hygienic properties. High level of noise cancellation despite the lightweight and narrow profile. Unique headband design: the stainless steel headband ensures even pressure, even when worn for long periods of time. 3M™ Peltor™ Optime™ II is the right choice for typical industrial noise environments.