Car stitched leather earmuffs, such as heavy clothing, scarves, gloves, etc., are commonly used in the warm protection of the society today. It is mainly to cover most of the surface of the human body, which can achieve the effect of resisting the wind and cold and keeping the body warm. However, when the cold current strikes, or is in a high temperature zone such as low temperature, conventional cold protection products cannot protect the human ear Therefore, exposed ears are very susceptible to frostbite and pain.