Powered by FILLER-A100 and Amino Acid, the Serie Expert Pro Longer Ends Filler Concentrate Single Dose is the go-to treatment for long hair suffering from thinned ends. Thanks to the high concentration of the patented FILLER-A100 molecule, this disruptive professional formula instantly provides strength and durable thickness to ends. HAIR TYPE - Long hair with thin ends RESULTS - Ends filling from first application* - Long lasting cumulative results* *Instrumental test using shampoo, conditioner and ends filler concentrate.