Leave-in Treatment to Repair, Restore and Revitalize Hair Amino acid is mainly composed of protein in the skin and hair. It can adjust pH value and moisture of skin. This product contained with silk protein complex, combines the moisturizing properties of silk amino acids with the film forming properties of hydrolyzed silk protein. Avoids damage by wind, sun, color, perm on hair and protect the hair from chlorine during swimming. Instantly smoothes and seals the cuticle with special conditioning benefits, deposit moisture deeply into the hair shaft and mend split ends. Promote shine, elasticity, and softness.