The Messina contains a layer of Latex - Latex is the ultimate natural elastic material, which conforms exactly to your body weight and shape, providing the optimum level of support for a healthy night's sleep. Latex allows for maximum breathability, essential for removing excess heat and moisture that will ensure you enjoy night after night of undisturbed sleep. For those who struggle with allergies, latex provides a safe option as it is naturally hypoallergenic and anti-microbial. It also has a 7 Zoned Support System - Zonal technology correctly supports and aligns the spine in its natural shape, helping to reduce aches and pains. Sealy Posturepedic are the only sleep systems endorsed by the world renowed Orthopedic Advisory Board. The mattress has a Unirail Support System - This system uses a high density foam strip placed inside the edge of the mattress springs. This stops the mattress from sagging and gives both longer life to the mattress and edge-to-edge support.