Hask® Keratin Protein Smoothing Shine Hair Oil Treatment gives a miracle makeover to damaged and over-processed hair. This oil penetrates the hair leaves frizzy, dry hair to soft, smooth and incredibly shiny. Hydrolyzed keratin protein is a highly specialized fibrous protein found in hair which increases the moisture content of the hair restoring luster and increasing manageability. This key ingredient increases the diameter of hair fibers, giving a fuller appearance to fine and thin hair. It also increases the hair's ability to retain moisture and reduces frizz and flyaway caused by dryness. This oil can be used on both wet and dry hair for a smooth, silky finish.