Only at Sephora What it is: A hyaluronic acid-infused overnight hair treatment mask that boosts moisture for 72 hours and results in hair that is 3x more hydrated by morning. Hair Type: Fine, Medium, and Thick Hair Texture: Straight, Wavy, Curly, and Coily Suggested Usage: -Comb through hair. -Pump one to four times into hands depending on hair length and thickness. For fine or thin hair, use one to two pumps. For medium or shoulder length hair, use two to three pumps. For thick or curly hair, use three to four pumps. -Apply to dry or damp hair before bedtime. -Distribute from mid-lengths to end—you‘re ready for your beauty sleep.