L'Oréal Professionnel Série Expert Pro Longer Mask was specially developed to care for long hair with thinning ends. The professional formula will not only make the hair thicker and stronger but also help to visibly reduce split ends. Formulated with an exclusive combination of FILLER A-100 and amino acids, this mask will truly renew the hair lengths. The FILLER A-100 patented technology works deep inside the hair fiber to thicken it while coating the hair surface with a protective layer. All the while, the Amino Acids will strengthen the fiber and prevent breakage. This formula will work on thin ends and other areas in the hair where it might be needed.