The Queen J. Queen Regal Waterproof mattress pad is the perfect foundation to your bed to keep your mattress protected and clean. The 100% Cotton top mattress pad is specially engineered with an allergen-barrier sleep surface to guard against dust mites, pet dander, pollen, and other allergens from penetrating your bedding. The reverse poly layering is waterproof for added protection and soundless for a restful sleep. The hypoallergenic ultra lofty fiberfill mattress pad is diamond quilted for a smooth breathable sleep surface. The 4-way deep pocket stretch skirt can fit up to a 21" mattress.