PURPOSE: To easily coat a human or animal location having a complex shape and reduce a rash on a skin of the human body or the like wearing a coating without adhesive agent used by using a stretching molding which easily shrinks by being brought into contact with humidity around a room temperature.

CONSTITUTION: A coating material is obtained from resin molding which shrinks in contact with humidity. The resin molding should be a stretched molding of resin A which simultaneously meets the following three requirements. That is, a glass-transition temperature is 50 to 300°C under absolute dry conditions; the glass-transition temperature drops to 20°C or lower with humidity absorbed; and strength at the time of absorbing humidity is 1kgf/mm2 or higher and elongation is 100% or higher. Since, normally the coating material can be instantaneously shrunk by having it subjected to conditions of relative humidity of 70% or higher or by spraying water or soaking the material in water, it can be used in any place where humidity or water is available. It is used for fixing various members, identifying individuals, preventing wetting, improving one's figure or the like.