The advanced zoned Mirapocket® spring system offers the ultimate in comfort. Each mattress with Mirapocket® technology contains individual springs that are held under tension in their own fabric pockets. Each spring responds to your body, spreading your weight evenly across the bed providing zoned support where you need it most, and luxurious, tailored comfort that is second to none. Featuring Silentnight's Eco Comfort fibers, this mattress is right for you and good for the environment, as its comfort layer is made from 100% recyclable plastic bottles that offer breathability and enhanced comfort for a more refreshing night's sleep. Size: Kingsize (5')