Heavy Duty Grippmat Cutting Boards by Dexas are durable, lightweight, non-slip and flexible. These cutting boards non-porous and non-absorbent and will not dull knives. The underside of each board features a non-slip backing to grip tightly to counter surfaces for safety. These flexible cutting mats roll to funnel prepped foods into pans and bowls. This set includes four different colors of Grippmats, each measuring 11 by 14 inches. Use different colors to avoid cross contamination between meats, cheeses, veggies and more. Dishwasher safe!