A highly moisturising, reparative conditioner for all hair types that leaves hair easy to manage, shiny and healthier with each use. N?5 is colour safe, leaves hair stronger than ever, and benefits all hair types and textures. Key benefits repairs hair and maintains bonds within the hair adds shine strengthens ph balance 4.0 5.0 pro tip use n?5 conditioner for every hair wash, with n?4 to add extra shine and strength to your hair. To use after using olaplex n?4 bond maintenance shampoo, apply a generous amount from scalp to tip. Leave on for three minutes, then rinse. Where focus on ends and distribute evenly. When formulated for daily every wash use. For all hair types. Olaplex products are thoroughly tested in house and by independent third party laboratories for safety and efficacy. This product testing includes the industry standard human repeat insult patch test hript, which tests for skin irritation or sensitivity. All olaplex products have passed the hript, meaning the products show no signs of causing irritation, inflammation, or sensitivity.