... defenders arecorrectly adapted, adjusted, maintained and inspected, in accordance with these instructions. If these instructions for use arenot respected, ... ear and the L mark on the left ear with the mark 'TOP' above the ear, then tighten the headband until ... , special for ergonomics, harmlessness, comfort, airing andflexibility and with the requirements of the European standards EN352-1:2002.Reducing ...