Nº.4D Clean Volume Detox Dry Shampoo has light-as-air dry cleansing technology for scalp and hair that feel just washed and first-day fresh. No powdery residue or gritty buildup. This healthy scalp dry shampoo leaves hair looking and feeling clean and is clinically proven not to clog follicles. Study Results:100% saw no white residue*97% said hair looked clean*97% saw a reduction of oil**In an independent consumer perception study of 30 participants after 3 consecutive uses.Formulated with Rambutan Seed Extract, Ultra-Fine Micro Starch, and patented OLAPLEX Bond Building Technology®.