Open the folded mask to form a three-dimensional, with the nose clip upward; press down the nose clip to make the mask closely fit the face; fit the face to adjust the tightness of the ear straps and adjust the comfort of the mask.
Open the folding mask to form a three-dimensional, nose clip up, press the nose clip to close the face, fit the face adjustment earband tight, adjust the mask comfort.
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 ear band, and adjust the comfort of the mask.<br>