Olaplex N°.8 Bond Intense Moisture Mask is highly concentrated reparative mask that adds shine, smoothness & body while providing intense, weightless moisture for visibly healthier hair. This weightless formula is powered by Olaplex bond building technology that fully absorbs into the hair and instantly smooths hair and provides weightless finish. The formula contains a key ingredient bis-aminopropyl diglycol dimaleate that works at molecular level to dramatically improve the hair strength, repair damage and protect the hair. It repairs, strengthens, and moisturizes hair prone to damage or dryness. Hair is made up of the fibrous protein, keratin and held together by bonds. Hydrogen and salt bonds are physical bonds and are easily reformed by changes in pH, water and/or heat. Disulfide bonds are chemical covalent bonds. These bonds cannot be broken by water. Millions of disulfide bonds give hair its structure, strength, and stability. When hair subjected to heat styling, color or chemical treatment, sometimes brushing & tugging or due to weather may lead to breakage of these disulfide bonds. When these disulfide bonds are broken, hair is damaged and can appear dry, frizzy, and brittle. Olaplex No.8 Bond intense moisture mask provides deep conditioning care for damaged hair whilst whilst adding body and shine to the hair.