Achieve salon-worthy hair with the Olaplex No.3 and No.0 Duo. Pairing pre-wash and reparative treatments, the duo works in harmony to leave hair feeling stronger and softer with a healthy-looking shine.Set Contents:No.3 Hair Perfector 100mlA pre-wash treatment designed to rescue and restore damaged hair as a result of colouring, bleaching and styling. Formulated with a bond multiplying system, it works to re-link broken hair bonds to minimise the risk of split ends and breakages. Expect silky-smooth results.No. 0 Intensive Bold Building Hair Treatment 155mlA bond-building treatment designed to prep hair to improve the absorption of subsequent products and achieve optimum reparative results. Acting as a primer for the No.3 Hair Perfector, it helps to strengthen and replenish damaged hair.The No.3 is free of DEA, aldehydes, formaldehyde and Butylphenyl Methylpropional (Lilial).