The Mammoth Shine Advanced mattress is one mattress in three firmness levels. Because the specifications vary slightly, we've opted to show all three as products in their own right. This range-topping mattress is simply superb and is designed for those who prefer a firmer level of comfort. The Mammoth range is all designed using information from scientific tests and with the assistance of health and sporting groups. We are proud to have delivered Mammoth mattresses to professional footballers, Olympic athletes and rugby internationals alike, all have loved the enhancement to their health.