The Revive Cooltek Titanium Eurotop Plush 14" California King Innerspring Mattress pairs a plush Eurotop with a responsive innerspring core to deliver both pressure relief and reliable support. Layers include 30% visco-elastic foam for contouring comfort, a 40% steel coil system for responsive support and edge stability, and a 30% breathable fabric cover that uses Cooltek cooling technology to help regulate sleep temperature. Made in the USA, this 14-inch mattress is built to work with standard foundations or a box spring to promote even support and extend mattress performance.