The Olaplex No.7 & No.3 Duo enhances your haircare routine with a pre-shampoo treatment & revitalising hair oil. The innovative duo helps to ensure that hair is easier to manage while promoting a healthier-looking bounce & shine. Set Contents: No. 3 Hair Perfector 100ml A weekly pre-wash treatment designed to soothe the look & feel of dry, damaged hair. The bond-building formula helps to support the hair structure & strengthen strands against further breakage. No. 7 Bonding Oil 30ml A nourishing hair oil enriched with bond repair technology to refresh damaged hair while minimising frizz & 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 & Butylphenyl Methylpropional (Lilial).