RESTOR Style Signature Cool Comfort Memory Foam Collection 10-Inch Plush Support Queen Mattress Mattress is a 4- lb density 2-1/2-inch memory foam top layer; 3-inch core structure ; 4-1/2-inch supportive base foam Meets all flammability standards Memory Foam is resistant to dust mites and is naturally antimicrobial Removable cover is machine washable/ dryable