Sprung: 13.5 gauge coil spring for superior comfort and support. Design: Stitching patterns may vary. Sizes: Small single | Single | Small double | Double | King | Super king. Mattress: Get a Cool Blue memory foam sprung mattress. Features: A spring mattress with a generous layer of Cool Blue memory foam. Memory foam: Moulds to the contours of your body and relieves pressure - ideal to encourage correct spinal alignment and supreme comfort when sleeping. | Cool Blue Memory Foam Sprung Mattress - Single | Wowcher