Quilted mattress: Get a quilted open sprung memory mattress. Bonnell spring: Includes a 13.5 open coil bonnell spring for a longer life. Six sizes: Available in sizes small single - super king. Quilted feel: Deep micro quilted for extra comfort. Size: Mattress depth is 9-10" (25cm). Bedroom essentials: Perfect addition to any bedroom. | Quilted Open Sprung Memory Mattress - Single | Wowcher