The Super Pillow Top version of the Market St Series makes for a super cozy, comfortable, yet supportive feel. The Market St Pillow Top uses the same Individually pocketed innerspring unit, which provides for optimum support, while still allowing for excellent contouring, and virtually no motion or bounciness. An additional layer of Plant Based Memory Foam provides even more contouring and pressure point relief. The Outlast cooling fabric provides for a more temperature regulated sleep, and the 360 degree foam encased edge support makes for a stiff seating edge and reduces roll off.