Memory sprung mattress: Get an orthopaedic memory foam sprung mattress. Layers: An open coil sprung layer, high density memory foam layer and wool layer. Construction: Features an open coil spring system, tailored to offer great support. Constructed with: Anti-bacterial, anti-dust mite and anti-microbial properties. Cover: With a luxury knitted cover designed to help stop bacterial growth. Size: Choose from single, double or king sizes. Orthopaedic Memory Foam Sprung Mattress | Living Social