Mattress Forum

I resonate with your question. Unfortunately I cannot help specifically, but I'll share what little I've been learning. I ran across an interesting article yesterday that provides atleast a relative understanding of how different mattress toppers might compare. see the following link: http://www.beddingcomponents.com/pdf/innersprings/softech-chart.pdf

I'm aware that most manufacturers evaluate warranty claims by how much change there is in the height of the bed where it has broken down the most. For foam type mattresses the standard threshold appears to be 3/4 of an inch of dip compared to a string held taught from the head of the bed to the toe. (I'm told they just use a short length of 3/4 in diameter PVC pipe.) For innerspring mattresses the standard is typically 1.5 inches.  Unfortunately however, the height to which the foam springs back has no direct bearing on the firmness of the mattress that is lost over time. Honestly I think their warranties should be based on both factors: loss of height, and loss of firmness. In your case, you could measure how much dip your bed and topper have together and use the same 3/4 in or 1.5 inch criteria as the big mattress companies. Otherwise, my only thought would be an anecdotal retrospective evaluation of your overall sleep quality: if you start waking up with an aching back or neck that's not likely caused by something else--then try a new mattress. That's all I have for you, sorry it's not more. The rest below is really just a rant

Somewhat related to your question, I'm finding it generally pretty tough to get ANY actual scientific numbers on the height and/or firmness retention of the various bedding materials commonly used. It's really frustrating to me to be looking at mattresses in an industry where the most information on I can get on a particular product are the Lbs/sq.ft. densities of the foams, or maybe the gauge of the wire springs. I'm appalled at how little scientific information is available to the end user.  

I work in a medical diagnostic device research and development company that has to have very clear specifications on materials and nearly all related characteristics. I'm somewhat used to reviewing material spec sheets for things like thermal stability, durometer, crushability, puncture resistance, water-vapor-transmission rates, UV stability, off-gassing, chemical inertness, Bio-compatibility, microbiological compatibility, surface binding potentials, etc. etc. There's a lot of marketing out there that claims that Company A has spent more on research than Company B, or that they have the most "advanced technology."  Those terms seem to imply that they are familiar with the concept of the scientific method that was pioneered several centuries ago that ushered in the enlightenment era that led to the industrial revolution.  In spite of that implication however, these mattresses are sold as anecdotally as snake oil used to be sold as a “cure-all” a century or two ago.

How often have you heard a salesperson say something like: "I've been in the mattress business for (a good number) of years... and this is the one I sleep on at home." My response to that is, "Yeah, so. We all wear different sized shoes and pants too." Or they’ll tell you things like: "Well, my friend had that other brand and they had big problems with it."  (I wonder what kind of problems their customers are really having with their mattresses that they are not telling us.)  But really, though, is an anecdote about some 3^rd or 4^th party’s dissatisfaction a compelling reason to spend several thousands more than you would otherwise?

They all ask, "how does this one feel to you?" But aside from how I'm feeling at that second, there's no real evaluation of my actual posture, physical alignment, weight distribution, etc.  After working in an emergency department at a major regional hospital for several years I can tell you that people RARELY ever actually lay straight when asked. On their own they "feel straight," but their feet hips and back may be 3inches out of alignment. They might realize however that they weren't actually straight once you straighten them up.  Consider this, if a radiology department can't rely on people to lay straight (even if they have perfect lateral symmetry) for a simple skeletal picture that a physician looks at for a few moments to spot gross pathologies, what makes mattress salesmen think that people can reliably discern when their posture is good/correct on a bed?  If it takes a physical therapist, an orthopedist, and a prosthetitician to correctly fit orthotics, prosthetics, or even simple old-fashioned crutches, why don't we have Sleep Posture Therapists that can truely evaluate one's posture and fit the right bed to your body type..with real knowledge, real numbers, and true ergonomics?  Hmmm...maybe there's a niche theraputic market there?  

I resonate with your question. Unfortunately I cannot help specifically, but I'll share what little I've been learning. I ran across an interesting article yesterday that provides atleast a relative understanding of how different mattress toppers might compare. see the following link: http://www.beddingcomponents.com/pdf/innersprings/softech-chart.pdf

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