After initial confusion what the smell in terms (extremely chemically unpleasant), this mattress had to eke out only once on the balcony their existence. After about 4 days she was allowed to take her test in the bedroom. I have to say it is excellent, my bed was revalued and the back says thank you. Reason of purchase was that my mattress was a little too hard, may be that I have grown; o), now it's a bit softer and more comfortable.
For material you can not say a lot, have not yet looked to see whether it has been declared. Whether the shape of the foam core remains is still uncertain, as I do not yet have the mattress so long. But one can certainly say in a year.
