Open the folded mask to form a three-dimensional, with the nose clip strip upward; press the nose clip strip to make the mask closely fit the face; fit the face to adjust the tightness of the mask band to adjust the mask for comfortable use.
Open the folding mask to form a three-dimensional, nose clip up, press the nose clip to closethe the face, fit the face adjustment mask belt loose, adjust the mask for comfortable use.
Open the folding mask to form a three-dimensional shape, with the nose clip upward; press down the nose clip to make the mask closely fit the face; fit the face, adjust the tightness of the mask belt to make the mask comfortable to use.<br>