Providing all the support you need while sleeping, the Sealy Millionaire President Firm Mattress feels incredibly firm, even for those whose stature is larger than average. This is thanks to the PostureTech Zero Deflection Construction Springs. Due to the small diameter of the springs, the spring count is higher than standard open coil designs. This resilient spring system produces the firmest level of support, optimum levels of comfort and incredible responsiveness.The mattress surface is stable and firm too due to the Edge Guard technology. The mattress edges are reinforced with a high density foam strip to increase supportiveness and prevent sagging. Even if you sleep right on the edge of your mattress it won�t bulge, and the reinforcing technology helps prevent you from rolling off.Stay fresh as you sleep while the natural Tencel fibres work to absorb, relocate and release moisture. These breathable fibres have a higher absorption level than cotton and the lack of moisture keeps dust mites at bay while preventing any bacteria from forming. Also helping to keep you dry, cool and fresh are the Sealy Smart Fibres. Containing Purotex, friendly bacteria is released onto the mattress fabric to reduce moisture and mould while repelling dust mites. Endorsed by Allergy UK, this natural cleaning solution is essential for providing allergy sufferers with proper sleep in a hypoallergenic environment.