K18 Leave -In Repair Hair Mask: K18peptide is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat. Ph-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state. Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits and vegan, color-safe.