These are brand new, never been used guinea pig cage pads. They are made with a soft fleece top and a layer of Uhaul to absorb fluids They are also reversible, so you can get twice the use out of them. These pads are perfect for keeping your guinea pigs warm and comfortable.can be used under housing, in corners where they soil or as lap pads for cuddle time. Solid gray fleece on backing 11” square