Available in single, small double, double & king sizes. Enjoy a perfect sleep with the stupendous 4000 pocket sprung mattress. The open sprung unit offers a medium- firm level of support. Hypoallergenic and dust-mite resistant. Built around the pocket spring system, which makes it strong & long-lasting. | Stupendous 4000 Pocket Sprung Mattress - Single | Wowcher