Memory 3 Sleep Silentnight. Originally created by NASA to hold astronauts comfortably in zero gravity during space missions, memory foam has gone on to become a firm favourite in households worldwide. Using your body heat to soften and shape around your body, memory foam regularly has a sumptuous soft feel that has been cited to help improve help problems including pressure sores, muscular issues and arthritis. So buy this Memory 3 Sleep Silentnight Now £168.00.