The water film magnetic is the hyaluronic acid cross-linked polymer, which is evolved hyaluronic acid, also known as hyaluronic acid 4.0. It is an ultra-high molecular weight polymer obtained through crosslinking reaction of naturally sourced sodium hyaluronate HA. It has a three-dimensional network structure that evenly covers the surface of the skin to form a breathable protective film. The structure is strong and compact with high elasticity and strong stacking support. It can be added to any skin care products to enhance the moisturizing effect. Using Only one drop is like applying a full moisturizing essence, making the skin silk satin like touch.