Memory Foam mattress topper

[phoenix]

Hi ddcfri,

Our experience has shown us that toppers with a 5-lb/ft3 density or less tend to break down and soften over time. We’ve had to make many warranty replacements from brands such as Sensus and Isotonic, and because our warranty is the best in the industry (we pay all shipping charges) it has cost us a lot of money. The brand-name leader established that a 5.3-lb density will hold up the best, and many years ago we switched to our current 5.3-lb memory foam and have no longer experienced any warranty claims. Yes, that extra three-tenths of a pound of density has made all the difference. Further, the superior comfort of our 5.3-lb memory foam has resulted in nearly no returns for comfort reasons even with our 90-day trial period.

There are many factors involved in the durability of a foam material but the one that is the most important factor is the unfilled polymer density of the foam (the density of the foam before any fillers if any are added). There is more about the variables that can affect the useful life of a foam material relative to each person in post #4 here and post #2 here and the posts they link to. I don’t know of any specific issue with the durability of Sensus or other 5 lb memory foams.

There is no “magic” in a specific density and their 5.3 lb density foam is a completely different foam than Tempurpedic’s 5.3 lb foam with different properties so their comments about the “benefits” of a specific density is somewhat misleading IMO. When you are looking at small differences in density then some of the other factors involved in the manufacturing of the foam or the properties of the foam (such as softness) would also make a difference. Foams also aren’t made to an exact density and a foam that is ordered as 5.3 lbs may be a little lower or higher because of the normal variance in the manufacturing process. For example … a manufacturer that orders 5.3 lb memory foam may receive memory foam that is 5.1 lb or 5.5 lb depending on the tolerance that they specify (normally it would be on the lower end of the tolerance range). In very general terms … memory foam that is in the range of 5 lbs or higher would be more durable than memory foam that is in a 4 lb density range but very small differences such as .3 lbs would be less important than some of the other secondary factors involved in durability.

I should also mention that memory foams of the same density made by different manufacturers can have a very different feel and different properties depending on the specific chemical composition of the foam (see post #9 here and post #8 here) so density isn’t a reliable indicator for how a specific memory foam will feel or respond to temperature or pressure.

As far as I know … their memory foam is made and sourced in China but it is now CertiPur certified for “safety” (see post #10 here) but they can confirm this. I don’t know the specific manufacturer of the foam.

Phoenix