L'Oréal Professionnel's Pro Longer Mask 250ml is a luxurious treatment designed to thicken long hair, promoting visibly healthier and stronger lengths. Used in conjunction with the Pro Longer shampoo and ends-filler treatment for long hair, this mask significantly reduces split ends by an impressive 66%. The innovative Filler A-100 technology operates by deeply penetrating the hair fiber to add volume and density internally, while amino acids fortify the hair externally, with a special focus on thin ends and areas in need of reinforcement. The Pro Longer mask embodies L€™Oréal Professionnel€™s commitment to responsible practices and luxurious hair care.