BE WARNED!!THIS PRODUCT CAN SERIOUSLY DAMAGE YOUR HEALTH!!...I CANNOT RETURN MATTRESS FOR REFUND AS I REMOVED POLYPHENE BECAUSE TO NOISY TO SLEEP WITH!MY FIRST NIGHT WAS NOT GREAT WAKENING IN DISCOMFORT. AFTER REMOVING POLYTHENE I WAS LOOKING FORWARD TO AN EXCELLENT SECOND NIGHT IN SILENT COMFORT! IT WAS NOT TO BE!! I AWAKENED AFTER ONLY 4 HOURS SLEEP IN AGONY!! MY BACK HAD SEIZED UP! I WAS SO SORE AND STIFF! FROM THE LACK OF SUPPORT WITH THIS POOR QUALITY PRODUCT!! MY WHOLE BODY WAS IN SPASM!!THE PRODUCT DID THE EXACT OPPOSITE OF WHAT IT CLAIMED TO DO!! BEFORE I SLEPT ON THIS POOR EXCUSE OF A MATTRESS MY BACK AND GENERAL HEALTH WAS GOOD!! AFTER LESS THAN 2 NIGHTS SLEEPING ON IT I HAVE BEEN LEFT WITH REOCCURING ACUTE BACK PAIN!!.....ALSO THE THICKNESS IS NOT AS ADVERTISED EITHER, NOT 4CM OF MEMORY FOAM AND ANOTHER 4CM OF MIDDLE MEDIUM MEMORY FOAM! IT WAS 3CM OF THE TOP SO CALLED GOOD STUFF! AND 5CM OF THE MEDIUM DENSITY ONE!!....SO ALL IN ALL THE WHOLE PRODUCT IS POOR IN EVERY DETAIL!! PLEASE TAKE YOUR MONEY AND CUSTOM ELSEWHERE!!....YOU HAVE BEEN WARNED!! DONT FALL FOR THE SALES ATTACK LIKE I DID!!...AVOID THE PERFECT SLEEP TRICORE 2200 DOUBLE MATTRESS AT EVERY COST!...YOUR HEALTH DEPENDS ON IT!!!