The 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. Reduces frizz and flyaways for up to 72 hours. Decreases blow-dry time, smoothing each strand without adding hold or excess weight. Softly defines and smooths air dried curls. Airless pump delivery system ensures every dose of definition and smoothness is dispensed. PH balanced.