100% made from japanese heat-resisting kanekalon fiber. * silky, soft, harmless material, natural appearance. * suitable for thin, middle or slightly thick hairs to add length. * 5 clips strongly attached,easily apply it in few minutes and long time stay in place. * naturally blends into your own hair. Clips will be invisible and can not be noticed. * easy to care.(Just need a little mild shampoo and hair conditioner then washing in lukewarm water, then set on a flat towel and let them naturally dry).