The Bio Ionic Thermal Active Nourishing Silk Leave In is a hair styling leave-in treatment used to nourish and strengthen your hair. The anti-frizz and humidity hair styling treatment gives a soft hold and is great for all hair types. The Bio Ionic Thermal Active Nourishing Silk Leave In NanoIonic compound releases natural negative ions that leave hair soft and shiny and hair color vibrant. Bio Ionic Thermal Active Nourishing Silk Leave In Benefits: Soft Hold Anti-frizz Nurtures and fortifies hair Promotes soft and glossy hair Perfect for all hair types Protects hair color Directions: Spray Bio Ionic Thermal Active Nourishing Silk Leave In lightly on towel dried hair. Comb through. Blow-dry hair.