OLAPLEX NO. 7 Bonding Oil not only leaves hair feeling uniquely soft and smooth, but it’s also ultra-lightweight and leaves no residue. It also protects color and reduces frizz and flyaways. Formulated with UV and heat protection, it guarantees safe styling with a hair dryer, straightening iron or curling iron up to temperatures of 230 degrees Celsius. OLAPLEX NO. 7 Bonding Oil is also vegan and cruelty free.