Developed for finer hair types, the Olaplex No.4 and No.5 Fine Shampoo and Conditioner Duo delivers lightweight hydration to dry lengths. Powered by patented Bond Building Technology™, both formulas promote stronger, thicker-looking hair. Set Contents: No.4 Fine Bond Maintenance Shampoo 100ml The high-performance shampoo sweeps away impurities and excess oils while lifting any product that could be weighing down lengths. Delivering weightless hydration, the cleanser reveals a silky-soft finish with a radiant-looking shine. No.5 Fine Bond Maintenance Conditioner 100ml Leaving hair looking refreshed and fuller, the nourishing improves visible smoothness, strength and manageability while conditioning for a sleek, glossy finish.