Redken extreme strength builder. 8.5 ounces. Deeply condition and strengthen distressed hair. Interlock protein network and fortifying complex delivers protein and ceramide to help fortify weakened areas, protect internal strength and reinforce protection and shine. Hair is healthy looking and resilient. After shampooing apply to towel dried hair. Leave on for 5-15 minutes. Rinse thoroughly. Sampled once, this is almost like new.