After the mattress I now have longer in use, one can say it is fully consistent with the manufacturer's specifications. I was also a little uncertain to order a mattress in the online shop Since you can not test it. It is very well located on the spring mattress and the morning wakes Relaxed on. For people who have a high body weight and back problems as I need a firm surface and you will find here The price performance is very good here I can recommend the mattress to anyone.