Inspired by indulgence while being firmly grounded in our revolutionary technology Ultra plush pillowtop with memory foam automatically molds and responds to your body's weight, shape, temperature and movement Gives even more counter-pressure alleviation, while promoting a deep, restful sleep Includes a luxurious cashmere blend cover that is dust mite and allergen resistant 20 year limited warranty for the set Tempur-Pedic Celebrity Queen Mattress SetOther foundations or boxsprings are not recommended for use withTempur-Pedic mattresses, as they may not provide a rigid base andmay void the manufacture's warranty.