The bacterial filtration efficiency of medical surgical masks should be not less than 95%, and the filtration efficiency of masks to non-oily particles should be not less than 30%. The mask piece can be expanded to 17cm, covering a large area of the face and providing better protection. The side of the mask is covered with edge technology, and the solder joints are encrypted to enhance the tension between the ear strap and the side of the mask.
Medical surgical mask