Hi cownox,
Besides the brief comments I mentioned in your other thread asking about them here … you can see here that they make some of their own mattresses and import some of them as well (from Sinomax in China according to the import record here).
Of course as I mentioned in the other thread … any mattress regardless of who manufactures it is only as good as it’s construction and the quality of the materials that are inside it. Knowing this information is the only way to make meaningful assessments of the quality or value of a mattress or make meaningful comparisons with other mattresses.
Besides this there is little information about them other than various retailers that list their mattresses but none of these include any of the quality specs of their materials that I saw and I haven’t talked with anyone at Solstice in person.
Phoenix