Olaplex Number 0 (5.2 oz)

How to use: Apply to dry hair, saturating from root to ends. Hair should be damp, but not dripping. Leave on for 10 minutes. Don't rinse. Layer Nº.3 Hair Perfector directly over top of Nº.0 and leave on for an additional 10 minutes. Rinse thoroughly. Cleanse with OLAPLEX Nº.4 Bond Maintenance Shampoo and OLAPLEX Nº.5 Bond Maintenance Conditioner. 5.2 oz