Tranquility Firm 1000. This firmer pocket sprung mattress is a perfect option for anyone needing, or requiring a more supportive sleeping surface. Mattress Over 1000 Springs in the 150cm Mattress Multilayer Upholstery Laid Over Flexible Spring Insulator Hand Tufted with Felt Collars Padded & Machine Fluted Borders Brass Vents to Increase Ventilation Flag Stitched Handles Suitable for use on Dreamworks Beds Bedsteads Divan Sprung Edge, Platform Top or 7" Firm Edge Storage or Non Storage Easy Moving Twin Wheel Castors