Sleep Innovations Anti-Allergy Memory Foam Mattress Topper, King All natural and permanent TANA Biotic DC fabric technology in the cover reduces dust mites on and in the topper 2-Inch memory foam is naturally hypoallergenic, dust mite and allergen proof Memory foam relieves painful pressure points, aligning the spine for a more restful sleep Extends and enhances the life of your mattress Washable, 100% cotton cover with ultra-tight weave; 233 thread count