Olaplex No.5 Moisturize u0026 Mend Leave-In Conditioner is your ultimate solution for salon-quality hair care. Designed with the revolutionary Olaplex Bond Building Technology and High-Adhesion Sealing Complex, it offers immediate and continuous repair from the inside out.Pro Tip:Perfect for all hair types, this leave-in conditioner boosts hydration and strengthens strands without weighing them down. Apply 1-2 pumps to clean, damp hair. Adjust the amount based on hair typeOLAPLEX 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.