This product adopts pollution-free microemulsified polymer. After being sprayed on the surface of objects, it forms a nano-coating, which can effectively block the invasion of water, oil, dust, mildew and other harmful substances. It prevents static electricity and resists ultraviolet radiation (UV rays cause dye fading), without impairing the softness and air permeability of leather and other materials. Under normal environments, one application can last for more than half a year.