A professional-inspired hair treatment  Works as the first step in a two-part system with N°.3 Hair Perfector  Formulated with the highest dose of patented OLAPLEX technology in any take-home product  Primes hair to absorb nourishment for maximum repair  Rebuilds hair bonds, strengthens & protects hair integrity  Hair appears softer, shinier & 3x stronger  Perfect for all hair types, especially for those with visible damage  Vegan & cruelty-free  Free of parabens, sulfate, nut, phthalates, DEA, aldehydes & formaldehyde 