앞면과 뒷면의 기능마스크은 다르다. 많은마스크s use a three-layer design type, in which the filter layer for filtering bacteria is located in the middle, the outer layer is a waterproof layer, and the inside is a water-absorbing layer. If it is worn backwards, the water-absorbing layer will become a waterproof layer, and the waterproof layer will become a water-absorbing layer, which will cause the saliva to adhere to the surface of the 마스크, and the more it accumulates, the more the 마스크젖을 수 있습니다마스크필터링 기능이 손실됩니다.