Trio Space saving luxury from Royal Warrant holders Hypnos Transforms from single to super-king size with ease, zip together mattresses 840 spring pocket sprung mattress, under bed an open coil Mattresses upholstered in insulating cotton with luxurious fillings Wide choice of upholstery available please call for details FSC certified Scandinavian pine base with platform top Did you know?:The mattress should be aired for four hours after delivery to freshen and remove any aroma from storage. It may take time for your mattress to attain its full size once the springs have settled to the correct position. This is due to the mattress being upright during transit. Settlement of fillings and indentations caused by body weight compressing the fillings are natural and not considered defects. This can be minimised by regular rotating (unless yours is a dual tension mattress). Product images are representative. Find out more