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).