COSRX Hyaluronic Acid Hydra Power Essence contains high purity of natural hydrating Hyaluronic Acid (hyaluronic acid), make the skin softer and moisturized, leaving bumpy and dry skin silky smooth. This oil-free gel type essence provides long-lasting hydration to the skin by retaining moisture in the skin. Hyaluronic acid also helps reduce the appearance of fine wrinkles by filling in the skin with moisture.