Olaplex No. 0 Kit is a two-step, professional at-home treatment that primes hair for deeper repair, strengthens weakened bonds within the hair strand, and repairs hair from chemical, thermal, mechanical, and environmental damage. This kit contains : - one 5.2 oz bottle of No.0 Intensive Bond Building Hair Treatment - one 1 oz tube of No.3 Hair Perfector Olaplex No.0 is a first out of two steps included in this limited edition box together with Olaplaex No. 3. It comes in a needle nose bottle for direct application to saturate the hair from its root to tip. It primes hair to receive the benefits of the No. 3. When used together at-home with No. 3, your hair will experience 68% more repair and become 3 times stronger after just one use. Directions : Apply No. 0 to dry hair, fully saturating each section, and let process for 10 minutes - do not rinse. Then apply No. 3 over hair to saturate it, combing through. Let process for a minimum of 10 minutes, then rinse, shampoo & condition