Laminate flooring is made of layers. The bottom layer is called "backing". It's designed to resist all moisture that could cause boards to miss shaping.
Above the backing is the inner core. The core is made from high-density fiberboard that is reinforced with a special resin to further enhance moisture resistance and increase durability.
Next is the image design layer. This is where the high-resolution image of wood, stone, metal, or other material appears.
The top layer is the wear layer. This layer protects the design from fading, scratches, and damage from everyday wear and tear.