The fiber used in the Encelia Active Hat System is called Euro Fiber. Euro Fiber is a revolutionary high-grade synthetic fiber that is so amazing that you may never go back to human hair ever again. It feels and moves like European human hair but it has the strength of a synthetic. Low Shine Color doesn't fade Feels like European human hair Moves like European human hair Looks wet (no other synthetic fiber can do this) Tangles less than most human hair wig