Hi Tanzanite.
Thanks for taking the time to share your comments and feedback.
You are certainly having your share of challenges in finding a suitable mattress (see your other topic here and my reply) and I’m sorry to hear that your Dormeo mattress was another in a long list of mattress that hasn’t worked out as well as you hoped for.
For the sake of others that are reading this … I think that the issue with your mattress may not be as much about a poor design or zoning (because this is relative to the specific needs and preferences of the person on the mattress) but because it just wasn’t a suitable “match” for you and some of the health challenges you are facing (although if the memory foam layer has split then it would probably be a defect and would most likely qualify for a warranty replacement).
Each person is unique and a mattress that is a perfect “match” for one person may be completely unsuitable for someone else to sleep on.
Phoenix