Since the mattress smells so after paint and chemistry and you can not use them as we, after we have unsuccessfully aired four weeks decided to wash the cover, which should eventually be a problem according to the description. For security reasons we have them washed at 30 and not at 60 degrees. Unfortunately, after that it was no longer possible to pull the cover over the foam elements. With violence and blisters, we finally made it. Now the mattress is so wrong that you could not possibly sleep on. Oh yes, and it is now collapsible no longer. To make matters worse it stinks by the way still! Real a total disappointment!