Safety Mask For Dust

A dust mask is a flexible paper pad held over the nose and mouth by elastic or rubber straps for personal comfort against non-toxic nuisance dusts. They are not intended to provide protection from toxic airborne hazards.

Can you reuse dust masks?

Unless the manufacturer of the mask states that the disposable mask should be placed within a specific time frame, workers are free to reuse the mask until the mask is damaged, soiled or contaminated. ... 

Workers can reuse dust masks until they become dirty, damaged, or contaminated.