Mask packaging should pay attention to?

Check before buying the mask box label content is complete, the label content should include the product name, manufacturer's name and address, net content ( Net capacity) , production date and shelf life or production batch number and date of use, within a production enterprise of health license number and product standard. Some merchants may put the expiration or careless businesses selling expired mask, so everyone should pay attention to mask when the choose and buy all the things in the label, prevent inferior mask on the face, skin of ministry letting a face hurt.