ASC Pearl Mattress - 6ft Super King Size Zip and Link; Upholstered in a resilient damask fabric, the Pearl mattress is an Ideal sleeping solution for those who prefer an orthopaedic feel. To pre-tension the mattress, the hand-tufted process is applied by passing nylon tapes through the mattress at regular intervals. Cotton tufts are fitted to both sides of the tapes to ensure the fillings are held securely in place.Tufting also gives it a firmer feel. The interior is made up of a robust 12.5-gauge open coil spring system, one of the firmest springs used in mattress manufacturing. To further strengthen the finished unit, a thick rod-edge wire is fitted around the perimeter springs to reinforce the mattress border. The Pearl is designed to be dual-sided and to acre for your new mattress, it39;s recommended that its rotated and flipped over regularly.