Unopened OLAPLEX Nº.6 Bond Smoother leave-in styling treatment, infused with patented OLAPLEX Bond Building Technology, is highly concentrated and smooths, conditions and strengthens while reducing frizz for up to 72 hours. Nº.6 Bond Smoother leave-in styling treatment reduces frizz and flyaways for up to 72 hours; decreases blow-dry time, smoothing each strand without adding hold or excess weight. The airless pump delivery system ensures every dose of definition and smoothness is dispensed.