Brentwood 4-Inch Gel Memory Foam Orthopedic Dog Bed, 100-Percent Waterproof 4" Thick - 2" Gel Infused Memory Foam and 2" Therapeutic Support Foam Advanced gel memory foam stays cool while relieving body aches, joint pain, hip dysplasia and arthritis 100-Percent Waterproof liner protects against accidents, dirt and liquids Soft microfiber cover is removable and machine washable 3 Year Warranty