Pro Longer multi-benefit leave in treatment for long hair helps to thicken the appearance of your long hair whilst making it visibly healthier and stronger looking. When used with the Pro Longer shampoo for long hair, there is a hair breakage reduction *. The Filler A-100 technology is patented to L'Oréal Professionnel, and it works by penetrating the fiber core to plump and thicken the hair from the inside. The formula works on thin ends, or areas where help is most needed. *instrumental test, after application of Shampoo + leave-on

Apply to shampooed, towel-dried hair. Do not rinse. Blow-dry or straighten as usual. Compatible with L’Oréal Professionnel Steampod. Renews the look of lengths. An exclusive combination of FILLER-A100 and Amino Acids to renew lengths. Leaves your hair shiny and reduces hair breakage.