Curated to bring dry, damaged hair back from the brink, this four-step haircare system relies on the strengthening powers of Olaplex’s patented bonding technology. Use in the order listed to improve hair elasticity and restore depleted strands.Set Contents: No. 0 Intensive Bold Building Hair Treatment 155mlThe first step in any Olaplex sequence, this pre-wash treatment primes hair for deeper absorption of nourishing actives in your subsequent steps. Infused with the highest possible dose of patented ‘bis-aminopropyl diglycol dimaleate’, it works to rebuild compromised bonds and protect the integrity of the hair structure.No.3 Hair Perfector 100mlA weekly pre-wash treatment that rejuvenates dry, damaged hair with silky-soft texture and shine. Ideal for in-between maintenance in between salon visit, the bond-building treatment strengthens and visibly improves the look of healthy hair.No.4 Bond Maintenance™ Shampoo 250mlA bond-repairing shampoo blended with gentle cleansers that simultaneously refreshes and reinforces the integrity of the hair structure. Helping to increase moisture levels for improved elasticity, the colour-safe shampoo protects against fading and oxidation.No.8 Bond Intense Moisture Mask 100mlAn incredibly conditioning mask ideal for hair weakened by harsh environments, heat-styling, colour treatments and brushing when wet. Revitalise a silky-soft feel and healthy shine.The No.3 is free of DEA, aldehydes, formaldehyde and Butylphenyl Methylpropional (Lilial).