Kerathik Hair Building Fibers thickens hair with every sprinkle. It’s safe and easy to use and provides excellent coverage for any shade of hair, even highlighted hair. Tiny little fibers designed to look like real hair sprinkles down on the hair and fills in around the base of the thinning hair. Giving you the self confidence in knowing you’ve taken years of your appearance and have a full head of hair again. Thicker fuller hair in minutes.