Hi Clutchless,
The mattress is made by Decourcy and Company and you can read more about them in post #2 here and in post #4 here.
It uses blended Dunlop and if you call Mark directly he can provide you with more information about any of his mattresses … not to mention it’s a little less costly to purchase one of their mattresses directly from them.
As I mentioned in the first post I linked as well … when you can’t test a mattress in person then your confidence that a mattress is suitable for your specific needs and preferences in terms of PPP (Posture and alignment, Pressure relief, and personal preferences) or that you have good options after a purchase if it’s not as close to your “ideal” as you hoped may also be an important part of your personal value equation.
Phoenix