Mattresses: Get a Damasak quilted open coil spring mattress. Long Lasting: Features a 13.5 open coil bonnell spring to provide even support for all of your body's pressure points. Firmness: Has a medium firmness which is perfect for all body types, and for people who like to sleep on their side. Sizes: Comes in a variety of sizes that will fit any standard sized bed base (see full details for dimensions). Mattress Depth: Nine to ten inches thick with responsive 40KG/M3 memory foam to mould around the shape of your body. Cover Material: A deep micro quilted hypoallergenic mattress with a four way stretch fabric for extra comfort. Quilted Open Coil Spring Mattress | Small | Living Social