The LANEIGE Water Bank Blue Hyaluronic Essence Toner 160ml is a hydrating toner designed to replenish moisture and prepare the skin for the next steps in a skincare routine. It features blue hyaluronic acid, which is a smaller molecule of hyaluronic acid that absorbs more easily and deeply into the skin. This toner aims to provide intense hydration, strengthen the skin's moisture barrier, and leave the skin feeling soft, smooth, and refreshed. It's often used after cleansing to prep the skin for serums and moisturizers.