This is the Zero Gravity 1000 mattress Healthopaedic. New for 2012, this piece uses state of the art technology to give you a "the weightless experience". Zero Gravity Foam is an innovative new material with outstanding results. 1000 individually incased pocket springs which provide great support in key areas through moving independently. The Tencel cover makes for a cool night's sleep, with superior moisture management characteristics. Made from eco-friendly materials derived from cellulose, Tencel is soft, breathable and naturally anti-bacterial. Its foam encapsulated sides make for excellent edge to edge support Its hand tufts and foam encapsulated side help retain its plumpness and superb edge to edge support, long into its life. Although this is a non-turn mattress, seasonal rotation is essential for even ware.