@ Diane37,
All the latex you are likely to encounter is a good quality material but Invigo is a brand name for DeCourcy. You can see some comments about them and the owner Mark DeCourcy (EDIT: who has now passed away) in post #2 here and in post #4 here. They will give you accurate information about their latex. Comparing the density of blended Dunlop with the density of 100% natural Dunlop wouldn’t be a particularly accurate way of comparing the firmness of the two materials (synthetic rubber is not as dense as natural rubber).
@ buttercupbetty,
I’ll leave that up to you since you are the OP of the thread. I’m not always too strict with this … especially if the OP is involved in the “off topic” conversations but if you want a new thread then I can always split it into a new thread from one post onwards (or even split off individual posts).
Just for clarity … which store did you mean here?
FWIW and for the sake of others that read this (because I think you already know) … SleepEz has a topper like this here.
Phoenix