Depth: Mattress has a depth of 9-10 inches. Size options: Choose from 5 UK mattress sizes - see full details for list. Mattress: Grab yourself a pocket sprung memory foam mattress. Inners: Individual pocket spring inners - hand tufted for extra comfort. Firmness: Medium firmness - great for side sleepers. Properties: Airflow border, high density memory foam build and hypo allergenic material. Pocket Sprung Memory Foam Mattress | Single | Living Social