одноразовые маски лицо пылевой фильтр рот грипп анти-загрязнение хлопок ветрозащитный 5шт утолщенные 4 слоя нетканые маски

built-in nose clip to fit the facial curve: how to use: 1. hold the earband on both sides with both hands so that the nose clip is above the mask, and use the mask against the chin. 2. hang the earband on your ear and adjust the earband to a more comfortable state. 3. press the forefinger and middle finger of both hands from the central neck to both sides at the same time until they are close to the ears. 4. cover the mask with both hands as much as possible, and perform positive pressur...