I'm in a dispute with a mattress store. I was sold an inferior quality mattress the was described as a Sealy Posturpedic Firm Eurotop and the the same without the Eurotop. Both are equally bad and offer no support for a back that needs support. My credit card company tells me my only recourse now is to find an independent or 3rd party who can test the mattress to prove that it does not meet the requirements to be labeled as "firm". I do not want an exchange because everything I tried in the store was uncomfortable. I agreed to settle on the Sealy because the salespeople told me I should sleep on it for at least several weeks or more to really evaluate it. After two night might back was so damaged I have to go for therapy. I know this mattress is not at all supportive, but I have to prove it to get my money back. How can I get it tested for firmness or support? I'm not concerned at this point with a test for long term durability, just an objective test to show that it is not as advertised.
ILD/IDF do measure compression, mainly in latex and memory foam matresses. But the problem you are going to run into is that there is no standard for what is soft/medium/firm, so you are really fighting a losing battle. If it makes you feel any better I have a Sealy Posturpedic Plush Euro Pillowtop and I have never gotten a good nights sleep out of it without a layer of memory foam on top.
Precisely what I am trying to say. ILD gives us one way to measure 'firmness' in essence and assign a numerical value. But what we label as soft/medium/firm is based on subjectivity. Science can tell you one bed is firmer than another, but not what the cut of point should be. If we left it based on this it would be like saying a 19 ILD Foam is soft, but a 20 is medium...in reality there is a barely discernable difference.
The mattress offers no support for YOUR back. That is not to say it doesn't offer support for ANY back. If the mattress sags past the 1.5" point it is defective and you can sue if the company refuses to honor the warranty. If the retailer offers a comfort exchange, you should use it. If they refuse to honor it and you were given it in writing, you can sue. If they do not offer an exchange or refund policy, with all respect and sensitivity, you selected the wrong retailer to purchase from.