This deeply nourishing serum contains 4 types of Marine Blue Complexes, Niacinamide, and 3 different weights of Hyaluronic Acid to deeply penetrate and rebuild the skin barrier. TonyMoly has the cutest packaging and this blue water drop shaped bottle is no exception. It's adorable and I appreciate the handy pump! This serum has a very lightweight consistency that absorbs quickly into the skin, plumping up tired skin, without any tackiness or stickiness. I like layering this after my essence, but before my active serums. I'm very impressed with the beautiful formula and extra layer of hydration it provides, particularly overnight. I wake up in the morning with a noticeably more calm, moisturized, and brighter overall complexion. I look forward to its long term results with daily use!