TWI725923B

A mask comprises a mask body, two elastic earloops and two flexible support bars. The mask body is provided with an extending portion having a plurality of folded edges. Each of the two ends of the flexible support bars forms a fixing point. The flexible support bars respectively have at least one bending and overlapping portion for a user to pull apart the flexible support bars and the bending and overlapping portion. By using the fixing points, the extending portion can be restored to the original folded state in which the folded edges is not pulled by the elastic earloops, so as to form a breathing space for the mask body. When the user wears the mask, the user's mouth foams, cosmetic rouges and lipsticks are prevented from contaminating an inner surface of the mask body through the breathing space, so as to reduce the frequency of replacing the mask and increase the utilization rate of the mask.