Visual Respiration Mask / Respirator Mask

Visual Respiration Mask is on the basis of ordinary mask adding a non-woven fabric layer mixed with pH solution. With breathing CO2 and H2O in a certain period of time causing the reagent components on the non-woven fabric to discolor. And the service life of the mask is determined. At the same time, a drawstring is nested in this layer. After use, the mask can be quickly folded only by pulling out the drawstring to avoid touching pollution.