Sherpa-Covered Pet Steps are designed for small and aging cats and dogs. They ensure that your best friend can still join you on the sofa or bed if he has hip dysplasia, arthritis, other joint problems, or if he simply has short legs. Stairs hold up to approx. 45 lbs. 18" x 14" x 12-1/8". Easy assembly required. Plastic and polyester. Removable cover is machine washable. Imported.