We just replaced our OEM Serta Winnebago mattress with a custom cut Tri Lux memory foam mattress from Knox Foam in TN. We have a Tempurpedic Classic at home and love it. We used the Knox Tri Lux for three nights on a recent trip and think it is as comfortable as our Tempur. The Tri Lux was half the price of a Tempurpedic queen.
So, if you need to replace your RV mattress, might want to consider this one. Knox Foam will cut the mattress to the exact dimentions of the bed platform in your rig.
This great mattess was recommended to us by another RV'r and I wanted to pass on the good info.
2007 Country Coach Allure Siskiyou Summit, sold/traded Nov. 2018.
2019 Grand Designs 384GK-R 5th wheel. Glen Allen, VA