The product that made OLAPLEX famous! Our global best-seller is an at-home treatment, not a conditioner, 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.PH Balance: 3.5-5 Where: Dampen hair and apply from roots to ends. When: Use once a week or two to three times a week for damaged hair. For: All hair types, especially for those with visible damage.