The basics Light-as-air dry cleansing technology for scalp and hair that feel just washed.  The benefits This healthy scalp dry shampoo is clinically proven to not clog pores or leave a white residue.  The uses No more dry, powdery roots or gritty buildup. Nº.4D is proven to leave hair looking and feeling clean. The bottom line Clean, weightless body Detoxifies scalp No grit or powdery residue No clogged pores