Hi Jbthompson,
They are open and transparent about the materials in their mattresses and all their mattresses use high quality materials and there are no “weak links” in any of them in terms of quality/durability. They are also included in the list of the better online memory foam options I’m aware of. They are made by Park Place which is a family owned company that has been manufacturing mattresses since 1931.
A forum search on Christeli (you can just click the link) will bring up much more information and feedback about them.
Phoenix