The Poly Spring Air model introduces the innovative concept of metal-free, or free of all metal components. The mattress consists of a molded top plate in latest generation visco-elastic Memory Gel of micro-particles containing gel promoting body thermoregulation and blood circulation by reducing pressure points. The Memory Gel is combined with the innovative Poly Spring independent micro and molded polyurethane springs, fully Air Foam, super breathable polyurethane cell explosions that promote breathability of the mattress, making it hypoallergenic and comfortable. The Poly Spring Air model provides elasticity and unparalleled flexibility.