Contour Encased Coil Single Mattress – Hybrid Support with CertiPUR-US® Certified Foam Comfort LayersSleep in comfort with the Palermo King Single Contour 20cm Mattress, designed with CertiPUR US certified foam and 7. 5 (19cm) 14 gauge pocket springs for lasting support. The individually encased coils contour to your body for even weight distribution and pressure relief, while the quilted foam layers on top and bottom provide a soft, cushioned feel that reduces coil sensation. Crafted with low VOC foam (<0. 5 PPM) for cleaner air and better health,