K18 Leave-in Molecular Repair Hair Mask is an innovative hair treatment that uses biomimetic hairscience technology to repair and restore damaged hair at the molecular level. This professional-grade formula works as a leave-in treatment to provide deep repair without being rinsed out. Key features: • Molecular repair technology • Leave-in treatment formula • Professional-grade hair restoration • Biomimetic hairscience • 50ml/1.7 fl oz size The K18 mask represents an advancement in hair care through its biomimetic approach, which means it mimics the natural processes of hair to achieve repair. The product comes in a sleek white bottle with minimalist branding, reflecting its scientific and professional nature. As a leave-in treatment, it differs from traditional masks that require rinsing.