The Poly Spring Bio model introduces the concept of metal free mattress which is free of all metal components. The mattress consists of a molded top plate in last generation visco-elastic Memory Gel, containing micro-particles of gel that promote thermoregulation and blood circulation and reducing pressure points. The Memory Gel is combined with the innovative Poly Spring system of independent polyurethane springs which are foamed and shaped into completely Ergo Foam products and are breathable, polyurethane water-based biodegradable and non-deformable, making the mattress hypoallergenic and at the same time respecting health and the environment. The Poly Spring Bio model provides unmatched flexibility and unparalleled comfort.