VOLUMISING SOLID SHAMPOO 3.9OZ 3.9OZ. Benefits: Like an espresso shot for your strands. Lifts roots and adds body to fine hair. Creates a fuller, more voluminous mane that defies gravity. Safe for color-treated hair. One shampoo and conditioner duo equals 8 liquid bottles. Key Ingredients: Biotin: Promotes fuller, thicker-looking hair. Epsom Salt: Adds texture and volume to fine strands. Caffeine: Stimulates roots for added lift. Research Results: Up to 10x more concentrated active ingredients*. *vs. typical liquid shampoo.