OLAPLEX No.6 Bond Smoother is a velvety, leave-in styling treatment that reduces frizz and flyaways for up to 72 hours, smooths blow-dries, and perfectly defines air dries - all without hold or heaviness. Made for all hair types and textures, including colored, chemically-treated, and gray hair. How to Use: Apply a very small amount to damp or dry hair from mid-length to ends. Comb through and style as desired. Start with 1/2 a pump for shoulder-length hair. Use more for longer, thicker hair, less for fine or short hair. Pro Tip: For extra smoothness and shine, mix a few drops of OLAPLEX No.7 Bonding Oil with a pea-sized amount of No.6 Bond Smoother and apply to damp hair before styling. When to Use: While No.6 Bond Smoother can be used daily on wet or dry hair, the effects last up to 72 hours. So daily use isn't necessary unless you shampoo every day.