Bone glue zymogen emergency mask, for double misturizing, ... working Efficacy:Collagen crystal mask in based on the preparation of L-dimension Vitamin C, licorice flavonoids ... , coarse, wrinkled skin problems. Usage:After cleansing the face, affixed to the face mask, every week 3-4 times used ... for the first time, the application can be 30 minutes, without the ...