Experience the ultimate comfort with the Signature Design by Ashley Limited Edition Plush Black and Grey 12-inch Mattress. Covered in a luxurious four-way stretch knit with cotton fiber and super-support polyester fiber, this mattress is designed to provide you with unparalleled relaxation. The one-half-inch high-density gel support memory foam over power-packed 15-gauge wrapped coils further enhances the comfort level of the mattress. Additionally, Ashley's edge includes two perimeter steel encased rows of 13-gauge wrapped coils for edge support, making it sturdy and durable. With a plush comfort rating, this mattress is perfectly compatible with a foundation or box spring that can be purchased separately.