The Optime II ear defenders feature sealing rings filled with a unique combination of liquid and foam to provide an optimum seal with low contact pressure. With a snug and comfortable fit, even during prolonged use, these ear defenders are an excellent choice for working environments with substantial industrial noise. Features and Benefits The sealing rings have ventilation channels to keep the user cool and comfortable Inserts are covered with soft and hygienic foam for ease of cleaning Inserts are easily replaceable for a long product life Low profile headband maintains constant pressure for a reliable seal Typical Applications Industrial Construction Operating machinery Airports Agricultural work