The Olaplex No.7 and No.3 Duo enhances your haircare routine with a pre-shampoo treatment and revitalising hair oil. The innovative duo helps to ensure that hair is easier to manage while promoting a healthier-looking bounce and shine.Set Contents: No. 3 Hair Perfector 100mlA weekly pre-wash treatment designed to soothe the look and feel of dry, damaged hair. The bond-building formula helps to support the hair structure and strengthen strands against further breakage.No. 7 Bonding Oil 30mlA nourishing hair oil enriched with bond repair technology to refresh damaged hair while minimising frizz and flyaways. The formula offers expert heat protection up to 232°C, helping to prevent further heat damage.The No.3 is free of DEA, aldehydes, formaldehyde and Butylphenyl Methylpropional (Lilial).