This mask is only used for the respiratory Protection of some particles. Before use, the wearer must read and understand these user instructions,Before use please check the user’s sealing according to the instructions in the fitting instructions section do not use this mask if proper sealing cannot be achieved,The influence of facial hair and beards on sealing should be avoided when wearing,Do not change,wash, abuse or misuse this mask,This mask cannot be used for other purposes beyond the scope of application of the product and it is not suitable for the workplace with open fire such as welding casting etc.