Hi vuchko,
I haven’t seen any feedback about the smell of the Heggedal on the forum but your mattress contains an 85%/15% natural/synthetic latex blend and there are a few people that have purchased the Morgongava which uses the same latex blend and mentioned that it had a strong smell (see posts #14, 18, 21, and 22 in this topic). There is also a comment here about the smell of the Edsele (which was very similar to the Morgongava and contained the same type of latex) and a comment here about the smell of another Ikea mattress (they don’t say which one) that also contained their 85% natural/15% synthetic blend and a comment here about the smell of their latex topper which also uses the same type and blend of latex. There is also a comment here about the smell of the Ikea Myrbacka which contains synthetic latex. The smell doesn’t seem to be consistent from mattress to mattress and only seems to affect some people and while it can take some time … the smell will normally diminish to the point that most people don’t notice it as the mattress airs out over time and the smell of latex isn’t harmful (their latex has been tested and certified for harmful substances and VOC’s).
The cover in your mattress (and all the mattresses that were mentioned in the previous links) also contains wool which can also be the source of some strong initial odors on occasion which also tends to diminish over time as well once it has had a chance to air out (see post #1 here for an example).
Phoenix