The band shall be strong enough to fix the position of the mask;the breaking strength of the connection point between each mask band and the mask body shall not be less than 10N

1.Do not modify or abuse this product
2.This product can not produce oxygen and don't use in anoxic environment.
3.This face mask is single-use,not allowed for reuse.
4.The best continuous use time is less than 4 hours.

1.Keep in cool and dry place,keep away from corrosive gas.
2.Keep in a clean,well ventilated place,and avoid direct sunlight.

Shelf life:2 years