Olaplex No.3 Hair PerfectorOpalex No. 3 Hair Perfector is a global best selling at home 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. PH Balance: 3. 5 5 A treatment that reduces breakage and visibly strengthens hair, improving its look and feel. Key benefits: Repairs damaged and compromised hair Strengthens and protects hair