I am tired of people describing mattresses as "Memory foam ", when the only have 2 inches of memory foam on top of 15 inches of cheap sponge.
The most troubling fact is that some buyers actualy think that they are buying a 100% memory foam mattress. Just the other day a woman walked into my shop asking for a memory foam mattress. Being honest and helpful, I started to explain to the lady how things are with a "memory foam" mattress and what options there are. She was very surprised when I told her that 99.99% of the "memory foam" mattresses on the market are only 10-15 % memory foam. She went on saying that she bought a 100% memory foam double mattress from a shop and she "only" paid £320. I am not saying that there are not 100% memory mattresses, but they would cost much, much more that £320 for a double.
I couldn't convince her that there were 99.99% chances that she bought a sponge mattress with a memory foam topper.
I unzipped the cover off a sample that I have in my shop and showed her how a "memory foam" mattress looks inside. She couldn't believe it. She left my shop convinced that I was wrong and she had bought a 100% memory foam mattress.
My conclusion is that people like to be lied to. They like to be told what they want to hear. They do not want to hear the truth.
The truth is that 99.99% of memory foam mattresses are at best 10-15% memory foam and the rest is cheap sponge.
If you want to buy a mattress with memory foam content, at least buy a combination one: pocket sprung with memory foam. They will last much longer than a "100% memory foam" mattress.