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Used masks contain a lot of bacteria inside and should not be disposed of directly. Therefore, we need to fold up the inside of the mask and throw it in the trash to avoid secondary infection of others. This is a pull-out mask design, where the inside of the mask can be folded in half by pulling it out. When the mask is no longer in use, simply pull the rope gently, the inside of the mask will be wrapped up, and we can safely dispose of the mask to avoid secondary contamination.