The TEMPUR Original Elite mattress offers firmer-feel support along with an incredible feeling of weightless comfort. Its all thanks to the unique layering of TEMPUR Material in this 25 cm mattress a deeper 9cm layer of TEMPUR Support Material for an outstanding firmer feel topped with a 3 cm layer of softer, cushioning TEMPUR Comfort Material. TEMPUR Material was officially developed by NASA to cushion astronauts during lift off and here its used to help distribute the bodys weight across the surface of the mattress, helping to relieve pressure for a better nights sleep. The incredibly comfortable TEMPUR Original Elite mattress comes with a QuickRefreshTM cover that makes washing and airing a breeze. This mattress is a no-turn mattress. Did you know?: After delivery the mattress should be aired for four hours to freshen and remove any aroma from storage. Due to the pressure-relieving properties of the material it may take some time to become accustomed to the level of comfort and support.