These fibers are made of organic keratin protein. which is the same protein that human hair is made of. because Toppik is a non-chemical preparation. so it is not afraid of using it and does not dissolve or absorb through the skin. and thus it does not disappear in the rainy weather or as a result of sweating due to the heat of the air or after exercise. And it does not go away by swimming. One of the advantages of Toppik fibers is that they do not stick to the hands while passing them through the hair because its texture is not greasy or sticky. to remove it. it is necessary to wash the hair with shampoo.