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In the winter, people often wear mask to prevent himself from cold.But mask usually wears eyeglasses' person a problem which is mainly because the vapor that makes wears eyeglasses' person can't see very clearly on their glasses.Therefore,I design this Mask. This kind of mask is basic on exhaust theorem.Due to the exhaust theory, then we can make holes which are oblique-down and make the vapor goes down instead of going up and make the vapor on glasses inside of mask.Meanwhile,the mask can also defense wind because of its special direction of release the vapor.Although mask changed in some ways, it still remains its original functions.