The proof is in the pump! Not only is this bottle packed with Olaplex patented bond building technology, its designed with an airless pump to get the most of your mask! 1 pump for fine or short hair 2 pumps medium or shoulder length hair 3 pumps thick or long hair All Hair Types. All TexturesThis Bond Intense Moisture Mask is a game-changing addition to your routine! 2X SHINE 4X MOISTURE 6X SMOOTHER 94% SAW MORE BODY Infused with patented OLAPLEX Bond Building Technology, highly concentrated reparative mask adds shine & body with intense moisture to treat damaged hair. WHY IT WORKS: Concentrated formula absorbs deeply to treat damage without weighing the hair. 3.3 oz**OLAPLEX products are thoroughly tested in-house and by independent third-party laboratories for safety and efficacy. This product testing includes the industry standard Human Repeat Insult Patch Test (HRIPT), which tests for skin irritation or sensitivity. All of OLAPLEX products passed the HRIPT, meaning the products show no signs of causing irritation, inflammation, or sensitivity. **