Mask

A mask, comprising:

• a cover body having a top surface, at least one air inlet and at least one air outlet, wherein both of the at least one air inlet and the at least one air outlet penetrate through the cover body, the at least one air inlet is located at a top of the cover body, and the at least one air outlet is located at a bottom of the cover body;
• at least one first fan disposed on the cover body, wherein the at least one first fan corresponds to the at least one air inlet;
• at least one second fan disposed on the cover body, wherein the at least one second fan corresponds to the at least one air outlet;
• and
• an air filter disposed on the cover body, wherein the air filter partially overlaps the at least one air inlet,
• wherein an axial direction of the at least one first fan, an axial direction of the at least one second fan and a normal line of the top surface are parallel to one another,
• wherein the cover body comprises a cover shield and a side frame, the cover shield has a shield edge, a concave surface and a convex surface, the concave surface and the convex surface are located at two sides of the cover shield opposite to each other, the side frame is disposed on the concave surface and is surrounded by the shield edge, the at least one air inlet is formed in the side frame, and the at least one air outlet extends through two sides of the side frame and two sides of the cover shield.