The Power of Two: Leave-in + Overnight Treatment for Multi-Tasking Convenience. Dual-use as a Protective Leave-In to strengthen and protect hair from heat-styling up to 450 F, reducing breakage by over 80%**, or use as an Overnight Treatment. Leaves hair feeling nourished, soft and manageable. Our kind-to-scalp Intensive formulas, infused with 2X* pre- and postbiotics, helps maintain an optimal foundation for healthy scalp and hair. Color-safe. Dermatologist Tested. *vs. all other Biotera Collections **Against combing breakage on damaged hair vs. a non-conditioning shampoo when used with Biotera Intensive Scalp Scrub + Shampoo TO USE: Apply evenly to damp hair prior to styling. As an Overnight Treatment, apply evenly to towel-dried or dry hair before bed. No need to rinse in the morning.