Memory Foam Mattress: Get a wave open sprung 25cm depth quilted memory foam mattress. Mattress Depth: Nine to ten inches deep with responsive 40KG/M3 memory foam to mould around the shape of your body. Firmness: Features a medium firmness which is ideal for all body types, and perfect for people who like to sleep on their side. Long Lasting: Features a 13.5 open coil bonnell spring to provide even support for all of your body's pressure points. Cover Material: A deep micro quilted hypoallergenic mattress with a four way stretch fabric for extra comfort. Sizes: Comes in a variety of sizes (see full details for dimensions). Open Sprung Quilted Memory Foam Mattress | Small | Living Social