The 11" Empire PLUSH Double Sided collection provides superior support for the individual. This mattress utilizes a 460 Verta coil innerspring flippable 2 sided unit made by industry leader Legget & Platt. The edge support allows you to transition in and out of bed with ease. The Empire PLUSH Double Sided also features a durable cover for a soft sleeping surface while being backed by a 5 year limited warranty for buying confidence. Made in the USA.