Product Description 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. Once a week, replace the Lengths Renewing Conditioner or Masque with the Single Dose Concentrate. Break the capsule and apply the concentrate on the ends. HAIR TYPE Long hair with thinned ends RESULTS Ends filling from first application* Long-lasting cumulative results*. *Instrumental test: Pro Longer Lengths Renewing Shampoo + Ends Filler Concentrate