Lin vibrates with danger and submissiveness.  The mask goes over the lower part of the face, and its height is 10.5 cm. You can see the ring with a diameter of 2.5 cm in the center. Also, there is a seam at the bottom. Two D-rings that are located on the sides fixate two narrow straps with buckles and adjustments. They clasp the head and fasten at the back, firmly fixing the mask. Lin leaves the mouth open, so, just in case, you can freely say your safe word.