The Emperor 4000 mattress is manufactured with the finest upholstery including opulent surface comfort layers of 100% pure British Wool, Super Soft luxury Pad for that Sink in feeling, and a rich mix of cashmere, silk and cotton for unsurpassed comfort. 100% British Wool comfort layers help control your body temperature, keeping you cool in summer, warm in winter, and disperse moisture naturally. The Luxury engineered spring system features individually encased pocket springs in a 3-tier construction – a centre core with an additional 2 x 1000 2″ support unit on each side to further enhance surface comfort. The combined unit adjusts to your body contours providing anatomically correct support with no ‘roll together’. The mattress spring unit has enhanced strengthened edge support to ensure total comfort across the entire sleep area, including a hand, side-stitched border. Sleep both sides – please turn regularly to maximise performance.