Stearns & Foster Estate 15-inch Soft Plush Pillowtop Innerspring California King Mattress pairs pressure-relieving memory foam comfort layers with individually wrapped coils to deliver plush cushioning and responsive support. The 15-inch quilted pillowtop is covered in a soft blue fabric that helps promote cooling sleep while minimizing motion transfer. Designed for back and side sleepers, this innerspring mattress is compatible with adjustable bases, made in the USA, and backed by a 10 year warranty and a sleep trial for confidence at home.