The K18 Leave-In Molecular Repair Hair Mask is a revolutionary leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. Powered by K18Peptide™, this advanced formula repairs and restores damaged hair by reconnecting broken keratin chains caused by chemical treatments, bleach, heat, and environmental stressors. This lightweight, leave-in mask nourishes and strengthens hair, leaving it softer, more resilient, and healthier-looking with each use. Ideal for all hair types, the K18 mask provides instant results, transforming dry, brittle strands into smooth, revitalized hair that shines with vitality. Simply apply to damp hair and let the mask work its magic—no rinsing required.