The Extended Life Mattress has 25-year warranty and has been rigorously tested beyond the industry standards. Superior high-density, innovative foams which cool, conform, and quickly respond with a zoned steel coil system to deliver consistent comfort and support. This along with an extra strength 12-slat wood foundation (sold separately) are used to ensure long lasting comfort and durability. Product Specifications Mattress Height: 15” Comfort Design: Tencel™ Fibers - a natural breathable fabric that offers pressure relief at the surface of the mattress. Graphite Plush Latex - Located in the first layer, graphite, a natural mineral, is infused with latex. The latex enhances durability and support for pressure relieving comfort while the graphite helps wick away moisture and heat from your body for a cooler night’s sleep. Superior High-Density Foam High Performance Foam iNergex3 - an enhance energetic foam that is highly breathable, cool and quick to respond to every body movement. This pressure relieving foam conforms like memory foam, but is highly resilient like latex, give you the best performance of both foam technologies for an undisturbed night sleep. Superior High-Density Foam Support Design: 1022 Perfect Contour® Reaction (PCR) Coil System - over 1000 active and reactive coils work together to comfortably support each individual body shape and size to improve postural alignment while reducing motion disturbance. Excellent Edge™ Foam Encasement Everlast® Base Foam Also available in a firm version.