With neckband!
Optime II has been developed for demanding noise-exposed environments and muffles even extremely low frequencies to a maximum. Sealing rings are filled with a unique combination of liquid and foam. The result is an optimum seal with low contact pressure, which provides snug-fitting comfort even during prolonged use.
The sealing rings have ventilation channels and are covered with soft, patterned hygienic foil. Optime II is a suitable choice for environments with substantial industrial noise or construction machinery, airports and agricultural work.