1, take the disposable mask, cut the rope and mask. The mask has two sides, white and blue, the white side facing in, the side with the metal bar facing up, first of all, the lower two straps tied at the back of the neck, and pull tight! Make the lower edge of the mask reach the base of your chin.

2. Pull up the top edge of the mask's straps to cover the mouth and nose, and pull the top two ties behind the ears and over the head and fasten them tightly, not over the ears.