The soft silicone provides a cushion to protect sink, glasses and dishes from scratching and chipping. Elevated underneath to allow for water flow and aeration. Designed with a convenient pattern that allows you to cu t a hole exactly where you need it, whether your sink drain is in the center or offset . The silicone is heat-safe, making it safe to place pots and pans in the sink directl y from the stove. Dishwasher safe.