Sealy Posturepedic® Plus Plainfield 13" Ultra Firm Mattress

Sealy Posturepedic® Plus Plainfield 13” Ultra Firm Mattress at Mattress Overstock The Sealy Posturepedic® Plus Plainfield 13” Ultra Firm is a flat, firm-feel innerspring built on Sealy’s Posturepedic® Plus support system—966 PrecisionFit™ coils tuned to keep your back and hips aligned, with just enough cushioning on top to take the edge off. The title tells you the starting point—an Ultra Firm feel, 13” profile, coil support—but the showroom test is where you learn whether it fits your shoulders, hips, lower back, partner movement, and base setup.