Olaplex Nº.5 Moisture & Mend Leave-In Conditioner contains OLAPLEX Bond Building Technology™ to deliver immediate moisturization and repair for all hair types. With the ability to seal split ends and improve the overall health of your hair after just one use, this potent leave-in conditioner also provides detangling benefits for effortless styling. Keep your hair strong and shielded from heat up to 450°F with this powerful formula.