* H7A has been developed for demanding noise-hazard environments and muffles even extremely low frequencies to a maximum degree.
* The 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 comfort even during long-time use.
* The sealing rings have ventilation channels and are covered with soft, patterned, hygienic foil.
* H7A is a suitable choice for environments with substantial industrial noise or construction machinery, airports and agricultural work.
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