Big dogs weigh a lot and are harder to keep clean. You need to buy a dog bed that provides good orthopedic support for joints and is also durable and easy to clean. Our line of extra large, huge and giant dog beds contain 4" or 6" (you chose) BioMedic memory foam that the manufacturer guarantees will NEVER sag, flatten out, or get lumpy for the life of your pet! The Endure-A-Dog fabrics used on these beds is easy to clean, dig resistant, and four of the fabrics are also waterproof!