Have a dreamy night's sleep with the Extra-Thick Comfort Memory Foam Mattress Open coil spring design with a layer of memory foam  Extra-thick depth of approximately 11-12" for ultimate relaxation Has a medium firmness so you can feel comfortable at night Made with hypo-allergenic and anti-bacterial filling Includes a cooling touch cover perfect for the hot months Choose from 6 UK sizes: small single, single, small double, double, king size, or super king size See Full Details for dimensions  Buying Options: 29.99 pounds instead of 3.9 pounds for the Small Single Mattress - save 92% 49.99 pounds instead of 3.9 pounds for the Single Mattress - save 87% 69.99 pounds instead of 4.9 pounds for the Small Double Mattress - save 84% 89.99 pounds instead of 4.9 pounds for the Double Mattress - save 80% 99.99 pounds instead of 4.9 pounds for the King Mattress - save 80% 149.99 pounds instead of 4.9 pounds for the Super King Mattress - save 69%