Interior padding for protective helmet, has closed, welded film, which comprises desired granules introduced in microgram, and hardness of interior padding is determined by inserting granules of synthetic material
摘要
<p>The interior padding has a closed, welded film, which comprises the desired granules introduced in microgram. The hardness of the interior padding is determined by inserting granules of natural or nature-identical or synthetic material. The exact compliance with the required filling quantity is achieved by the aid of a water-soluble film.</p>
