his specially designed Thin Pad provides effective coverage at 17.5" x21". These Thin Pads can be trimmed to any shape necessary. Use sharp scissors or utility knife to cut to desired size. Additional holes if needed can be cut in the same manner. These Thin Pads are made to our specifications and will give you long use in most weather conditions. Hand washable cold water or hose off. Hang to dry. Do not bleach, iron, or put in dryer.