The Best Pet Supplies Corrugated Cardboard Cat Scratcher Refill Pads are perfect for keeping your cat active and entertained. Made of heavy-duty cardboard that’s durable and recyclable, these pads are designed to last. The pads are available in a variety of colors and sizes, so you can find the perfect fit for your cat. With a variety of designs to choose from, there’s sure to be a favorite among your kitty friends.