I believe I have read one thread where Phoenix was touting SelectFoam over Novosbed (in the battle between good and good), with one of the reasons being SelectFoam uses a higher quality base (support) layer of polyurethane foam. I think the numbers given were SelectFoam at 2.5lbs/cubic ft vs Novosbed at 2.0lbs/cubic ft.
Does this really make absolute difference in terms of lifespan of the bed (or in any other area)?. I seem to remember another thread where it was stated that anything over a 2 lb density in the base layer was good.
Also I have read that the average lifespan of medium to high quality memory foam mattress seems to be 7-11 years (which is also kind of amusing since I always hear people planning on having their bed for the next 20-25 years). Would it be fair to say that a reasonable estimated use I will get out of a Novosbed or Selectfoam (having maybe a 4 inch total memory foam layers) would be somewhere in this 7-11 year range?
I know Phoenix would say that everybody is different and what may be still in the acceptable range for one person over time might not be acceptable for another, but it would be helpful to get a general idea of how long I can reasonably expect to use the bed that I am spending money on, so I can make an educated decision based upon the value.
In other words, there is no point in paying double the amount of money if two mattresses are similar in comfort and similar in expected lifespan. Does 2.5 density vs 2.0 equate to something tangible…