Sink into a layer of memory sprung for extreme comfort. Get a great night's sleep on this orthopaedic mattress. Offers support for your back, neck & shoulders whilst you snooze. Medium to firm rating - depth: 9 - 10 inches (22-25cm). Available in small single, single, small double, double, king & super-king sizes. Hypoallergenic to keep those sniffles and sneezes to a minimum. Orthopaedic Memory Sprung Mattress | Single | Living Social