This specially-designed, machine washable mat absorbs and contains 5X its' weight in liquid, and provides a soft area to potty train new puppies or to give older, incontinent dogs a place to go indoors. Featuring 2 layers of protection with a waterproof non-slip backing and patented Zorb-Tech anti-flow technology, these leak-resistant potty pads quickly absorb and contain liquids, keeping the surface layer dry to reduce urine tracking. Polyester. Use it with or without a pee pad. Available in Large (20" x 28") or Extra Large (28"x 36").