You won't lose sleep on the Corona St Pillowtop mattress. It gives you cozy sleep, while not breaking the bank. This Pillow Top mattress features an upgraded coil unit that provides vertical support, and promotes a straight line sleeping posture. Steel edge supports help reduce lateral motion transfer and give extended life to the seating edge. Bamboo fabrics provide for a more temperature regulated sleep, while the comfort foam gently contours to every curve of the body.