Vanadium Steel Wire Springs: With improved resilience and even pressure distribution, the innerspring support system within the Elite bed features 1,632 springs sewn in individual calico pockets and hand formed into a honeycomb-nested unit for superior support that is less likely to suffer “height loss” after years of use. Cotton Layering: A naturally breathable material, cotton has the ability to wick away moisture while facilitating airflow. This creates the ideal sleeping environment each night as the Elite bed responds to your body temperature, keeping things cool and dry. British Fleece Wool Layering: Pure and lush, the wool inside each Vi-Spring mattress acts as a natural climate control system while adding a layer of supreme comfort. Mattress Springs: Vanadium wire springs, 2.2 inches (56mm) in diameter, sewn in individual calico pockets and hand formed into a honeycomb-nested unit. Mattress Border: 8.3 inches (21cm) deep with two rows of genuine hand side stitching. Eight horizontal handles on Queen size and above. Air vents on all sides. Borders upholstered in protective wool, finished with piped ticking.