The Nº.4D Clean Volume Detox Dry Shampoo, infused with patented OLAPLEX Bond Building Technology, is a healthy scalp dry shampoo that leaves hair looking first-day fresh with clean, weightless body and the scalp feeling calm and comfortable. The Nº.4D Clean Volume Detox Dry Shampoo is clinically proven not to clog pores or leave a white, powdery residue.