No.3 This home hair treatment that reduces breakage and visibly strengthens hair, improving its look and feel. It will restore your hair's healthy appearance and texture by repairing damage and protecting hair structure. 100ml - N°4 Shampoo repairs and protects hair from everyday stresses — including damaged hair, split ends, and frizz — by re-linking broken bonds. Leaves hair easier to manage, shinier and healthier with each use. N°4 is color-safe and proven to reduce breakage and strengthen all types of hair. 250ml Apply to dry hair (concentrating on the mid-lengths & ends) and comb through...leave for a minimum of 10 minutes...then shampoo and condition as normal. - No.5 For all hair types. Leaves hair easier to manage, shinier and healthier with each use. Protects and repairs damaged hair, split ends, and frizz by re-linking broken bonds. It is color-safe and will strengthen and leave your hair stronger than ever. 250ml - N°6 strengthens, moisturizes, and speeds up blow-dry times. For all hair types, it helps to reduce frizz and flyaways for up to 72 hours. Apply a small amount to towel dried hair (consentrating on the mid lengths & ends) and blowdry and style as normal. - No.7 : A highly-concentrated, weightless reparative styling oil. Dramatically increases shine, softness, and color vibrancy.N°7 minimizes flyaways and frizz, while providing UV/heat protection. Apply a small amount to towel dried or dry hair and dry/style as normal. - No.0 : Primes hair to absorb nourishment for maximum repair A professional-inspired treatment that primes hair for deeper repair with the highest dose of patented OLAPLEX technology in any take-home product. Use as the first step in a two-part system with N°.3 Hair Perfector. Apply to towel dried or dry hair (concentrating on the mid lengths & ends) and comb through... then apply Olaplex No.3 in the same way... leave for a minimum of 10 minutes. Shampoo and condition as normal.