Depth: Approximately 18.5cm thick deep with a layer of responsive cool blue memory foam. Mattress: Get a gel memory foam quilted sprung mattress. Comfortable: Features an open coil bonnell spring and uses a four way stretch fabric for extra comfort. Support: Designed to contour to your body's natural shape, relieve pressure points across the body and promote good blood circulation. Medium firmness: Perfect for side or front sleepers. Sizes: Valid in single, small double, double, king or super king. Gel Memory Foam Quilted Sprung Mattress | Blue | Single | Living Social