American Crew Precision Blend Shampoo 250ml The innovative formula in this American Crew Precision Blend Shampoo is designed specifically for men. Containing polyphenols and Benzophenone-4, the ingredients in this shampoo combine together to strengthen, protect and deeply cleanse the hair. With powerful moisture binding properties, the Precision Blend Shampoo works to protect hair colour from fading and damaging UV rays, leaving hair shiny and tangle resistant.