N°6 strengthens, moisturizes, and eliminates frizz and flyaways for up to 72 hours. Excellent for all hair types, including colored and chemically treated hair. Please see below for Nº.6, 6 ways! PH Balance: 4.0-5.0 Where: Apply product from mid-lengths to the ends. When: Use after each wash, or as needed for styling. For: All hair types. Blow dry or air-dry styling.