Mattress Depth: fifteen centimetre's thick with responsive 40KG/M3 memory foam to mould around the shape of your body. 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. Firmness: Has a medium firmness, perfect for people who like to sleep on their side. Sizes: Comes in a variety of sizes that are suitable for any standard sized bed base (see full details for dimensions). Mattresses: Get a damask quilted open coil spring mattress. Quilted Open Coil Mattress | Small | Living Social