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