Summary Biolage Smooth Proof Hair Serum tames frizz and flyaways leaving you with sleek, soft, manageable hair. This leave in treatment is a powerful heat protectant against styling tools and humidity, and also significantly enhances hair shine. Benefits Provides smoothness and shine to frizz-prone hair Controls frizz for up to 24 hours Leaves hair looking and feeling soft, sleek, and shiny Adds a protective layer to the hair Nourishes and protects against environmental aggressors Reduces dehydration and frizz Key Ingredients Camellia Oil (cold pressed): A nourishing emollient that acts as a protective layer against environmental aggressors, like humidity, to eliminate frizz Glycerin (filtered): A natural humectant that draws moisture to the hair to reduce dehydration and frizz 3.4oz