The Platinum Plush Mattress, by Symbol Mattress, gives you a quality mattress at a great value price. Individually wrapped, heavy duty coils, provide great support as they adjust to your curves. The Quantum Edge, denser coils around the outer edge, provide a sturdy sitting edge as well as providing full use of the mattress surface. Layers of comfort foam, including Gel in the quilting, helps keep you cool as you sleep. A very good buy for a back or side sleeper.