Olaplex No. 0 Intensive Bond Building Treatment 5.2 Oz

What it is: Primes hair to absorb nourishment for maximum repair.What it does: A professional-inspired treatment that primes hair for deeper repair with the highest dose of patented OLAPLEX technology in any take-home product. It rebuilds hair bonds, strengthens and protects hair integrity. Use as the first step in a two-part system with N3 Hair Perfector. What else you need to know: APPLICATION TIP: N0 bottle should last 3-6 applications, based on hair length and density.