The L'Oreal Paris Hyaluron Plump 72hr Moisture Wrapping Mask: Offers an intense hydration boost, instantly wrapping hair with moisture, leaving it replumped, 10x more hydrated for 72H* with no weigh down. It is powered with Hyaluronic Acid, a molecule naturally found in the body that retains 1000x its weight in water to help replump hair. *Instrumental test. The Power of Hyaluronic Acid Naturally found in the body, this molecule retains 1000x its weight in water to help replump hair. Hair tip: Apply to wet hair after using Hyaluron Plump Shampoo, work through your mid-lengths and spread evenly right to the ends. Leave on for 2-3 minutes, then rinse. Please be mindful of water usage.