Support Premium Sleep: Circular design donut dog bed is ideal for pets who like to curl up. The raised edges create a sense of security and provides excellent support for the head and neck and relieves joint and muscle pain. The cat bed is moisture-proof to protect your pet from moisture! The dustproof design at the bottom helps prevent accidental slip-resistant fabric. Specifications? Medium: 20'' x 20", suitable for pets up to 15 lbs. Large: 24'' x 24", suitable for pets up to 25 lbs. Suggestions? When you open the package, please shake and leave it for 1-2 days as it is made of soft polyester padding and uses plenty of padding, and thick bottom can keep your dog off the cold tile.