Synergy 9000. Some of the highest density memory foam we have to offer. A layer of Vitafoam with lumbar support zones topped with 90mm of 75kg/m3 HD foam, for great support and comfort. Breasley's own temperature regulating 37° cover delivers the optimum sleeping heat whatever the weather. Special airflow channels minimise moisture to prolong the mattress's lifespan. So buy this Synergy 9000 Now £460.00.