Have the mattress for our 15 year old son bought, which has a slightly curved spine, therefore also chosen a higher mattress core, for a more flexible adaptation of the mattress to the body! Sohnemann is very satisfied and only sleeps again so as to be sollte.Absolute recommendation, since we had already bought him an original Tempurmatratze, he did not but klarkam by excessive trough formation and thus less turning his body, and even too much on sweating, which is only in the guest room, and the 2000 Euro, sometimes more expensive is not necessarily better, in this case it is so, and if they might hällt 1-2 years, ok.deshalb a recommendation!