protects us Keeps safety with domestic materials All raw materials and subsidiary materials including filters are manufactured in Korea. Manufactured by ISO13485 certified manufacturers. This certification is an international certification for the medical device quality management system, meaning that it is a high quality management system. Soft fabric that hardly produces lint prevents skin troubles. You don't have to choose a size for this product because the length of the ear band is adjustable. It is a product that can be used safely and comfortably by everyone from teenagers to adults.
