We also have a new RV with a mattress made by Michiana Mattress Co. that flattened in no time, and the manufacturer won't stand behind it. Its a memory foam mattress and when new was very comfortable but within a month was sinking and not returning to its original shape. We took pictures of the dip in the surface that was more than 3 inches deep and sent it to our RV manufacturer and they forwarded it to Michiana Mattress, it was turned down for warranty. Luckily our RV manufacturer will replace it for us. It will get us by until we can find a good quality residential mattress.
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