The Olaplex No 4 and No.5 Shampoo and Conditioner Set is a professional-grade duo designed for all hair types. This set, with a size of 8.5 oz each, strengthens and hydrates hair with active ingredients like Dimethicone, Aloe Vera, and Biotin. It is paraben-free, cruelty-free, and contains vitamins, making it a high-quality choice for both men and women. Made in the United States, this set is perfect for achieving strong and healthy-looking hair with fast shipping for your convenience.