Features: - EN352-2: 2002 / CE1974 hearing protection certification - A built-in filter - Nominal diameter: 7-11 mm - A plastic carrying case - Suitable for use on and off road - An anti-allergenic material - They can be worn for a long time and reused - Easy and comfortable to use - They keep the sound quality - They allow intercom devices to be used - H:20DB / M:15DB / L:11DB