This product is designed for use with the tank. The skirted design conceals the trap way, which enhances the elegant look of the toilet and adds an additional level of sophistication. It also minimizes the need to reach behind the bowl to clean the nooks and crannies of the exterior trap way. When paired with the tank, the product utilizes a 360-degree cleaning power to reach every part of the bowl. It includes CEFIONTECT, a layer of exceptionally smooth glaze that prevents particles from adhering to the ceramic. This feature, coupled with the DynaMax Tornado Flush, assists to reduce the frequency of toilet cleanings, minimizing the use of water, harsh chemicals, and time required for cleaning. The enhanced design of the inner bowl reduces water flow resistance and turbulence, resulting in a quieter flush. When paired with its tank, it meets the standards for EPA WaterSense®, and California's CEC and CALGreen requirements.