Hi Floorsleeper,
You can see a list of the ILD ranges for Radium’shereforboththeirblendedand100%https://uploads.mattressunderground.com/outside/0https://uploads.mattressunderground.com/outside/1
The only way to know would be by asking a reputable online dealer who will accurately tell you what they sell and would have no reason to deceive their customers about what they are purchasing.
Phoenix