This lightweight leave-in treatment works while you sleep to repair, strengthen, and hydrate, so you wake up with softer, healthier-looking hair. It’s made with a superfood blend of flaxseed and chia-seed extracts to help smooth dry, damaged strands; Crown Affair’s signature tsubaki and meadowfoam seed complex for weightless hydration; and rosemary leaf extract to boost shine. Apply a couple of pumps to dry hair, comb it through, and let the serum work its magic overnight. 100 mL / 3.4 fl oz