WHAT IT IS A professional-inspired treatment that primes hair for deeper repair with the highest dose of patented OLAPLEX technology in any take-home product.WHAT IT DOES• Primes hair to absorb nourishment for maximum repair
• It rebuilds hair bonds, strengthens and protects hair integrity
WHAT ELSE YOU NEED TO KNOW• Use as the first step in a two-part at-home system with No.3 Hair Perfector (sold separately) to strengthen and repair all types of damaged hair
• Scientifically proven: 68% more repair & 3x more strength
*When No.0 & amp; No.3 are used as a two-part system