L'Oreal Paris Pro Longer Hair Thickening Shampoo is a professional, length-renewing shampoo designed for long hair prone to thinning and split ends. Its Filler-A100 and amino acid formula thickens hair and renews lengths for healthier-looking ends. This shampoo is part of the Serie Expert line, designed to revive long, damaged hair and give it a fuller, healthier appearance. Perfect for those looking to maintain length while improving overall hair health.