My guess,
Serta Suite Dreams Mattress, though not positive for the DT.
When I checked the mattress tag at a HGI in GRR, it was a Serta Suite Dreams Mattress. But I am not sure if they are using the same brand across all hotel brands.
Here is some more information about Hilton's
new bedding and other in room upgrades.
I am sure the bed can be found cheaper on some other site.