Hi LukeMorris,
I would keep in mind that the density of polyfoam is the single biggest factor in the durability of polyfoam but it has very little to do with support because any density of polyfoam can be made in a wide range of firmness levels. 2.5 lb polyfoam is a durable material and would be suitable for your weight in terms of durability but the only way to know whether any mattress or combination of materials and componentswill support your body and keep your spine in good alignment will be based on your own careful testing and/or your own personal sleeping experience.
With a local purchase knowing the ILD information for the various layers is mostly meaningless and will generally only add to confusion. Careful testing for “comfort” and PPP (Posture and alignment, Pressure relief, and your Personal preferences) based on what your body tells you is much more reliable than choosing a mattress based on complex combinations of specs that can take many years of experience to understand how they all interact together.
For some people that have a great deal of experience in the industry or who design mattresses knowing the ILD information of the layers in a mattress can be helpful or even essential for business or design reasons, the ILD of a material is only one of many variables that determines how soft or firm the materials or a mattress “as a whole” that uses it will feel (see here) and ILD numbers are not comparable between different materials or in many cases between different versions of the same material anyway (see post #6 here).
For most people knowing or finding out unnecessary specs can be overwhelming and for those that do know a little bit about foam specs they can often tend to make choices based on specs alone or believe that they know more than they really do (for example making choices based on foam density or ILD alone when these are just two of many variables that can affect the feel and performance of a mattress). Too much information and too little information can both result in poor choices. In many cases mattress manufacturers don’t provide the ILD of their various foam layers because they are well aware of the risk of providing too much information to a customer and understand that for most people it would be more misleading than helpful. While knowing the quality specs of a mattress that can affect the durability and useful life of a mattress is an important part of making an informed choice … knowing the “comfort specs” of a local mattress isn’t nearly as important as listening to what your body tells you with careful and objective testing.
While I can certainly help with “how” to choose … I don’t make specific suggestions or recommendations for either a mattress, manufacturers/retailers, or combinations of materials or components because the first “rule” of mattress shopping is to always remember that you are the only one that can feel what you feel on a mattress and there are too many unknowns, variables, and personal preferences involved that are unique to each person to use a formula or for anyone to be able to predict or make a specific suggestion or recommendation about which mattress or combination of materials and components or which type of mattress would be the best “match” for you in terms of “comfort” or PPP (Posture and alignment, Pressure relief, and your Personal preferences) or how a mattress will “feel” to you or compare to another mattress based on specs (either yours or a mattress), sleeping positions, health conditions, or “theory at a distance” that can possibly be more accurate than your own careful testing (hopefully using the testing guidelines in step 4 of the tutorial) or your own personal sleeping experience (see mattress firmness/comfort levels in post #2 here).
There is more about the 3 most important parts of “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
While there are certainly some cases where a more costly mattress that is similar to others in a lower budget range may be “worth it” for a particular person that isn’t price sensitive and that has specific criteria, needs, or preferences that aren’t available or that they aren’t able to find in lower budget ranges and in some cases like this a mattress that is in a much higher budget range could still be a good “value” choice for some people … in general I would need a compelling reason that clearly indicated there was “enough” of a difference in “real life” between the Vinyasa and other mattresses that may also be suitable in terms of comfort and PPP and would be just as or more durable to satisfy yourself that any higher cost was justifiable and that you weren’t being “influenced” by marketing stories or the belief that higher prices mean a “better” mattress.
They would be the best source of information about any of the materials and components in any of their mattresses. I believe that they are “all latex” mattresses with wool quilted cotton covers but the current description on their website doesn’t specify the type of materials they are using in the comfort layers (it just says “natural materials”) and only says it has a natural latex core (which doesn’t specify the type of latex) so I would make sure that you find out the information here about any mattress you are considering before making any purchase.
If they are “all latex” mattresses then they would certainly be a very durable choice that was at least as durable if not more durable than the Vinyasa but I can’t speak to whether it would be a good match for you in terms of comfort, firmness, and PPP.
If you’ve read the mattress shopping tutorial then you already have all the basic information, steps, and guidelines that you will need to make the best possible choice but I’d certainly be happy to answer any specific questions you may have along the way,
Just in case you haven’t seen it yet … the better options or possibilities I’m aware of in and around the Ft Worth/Dallas area (subject to making sure that any mattress you are considering meets the quality/value guidelines I linked earlier in this reply) are listed in post #4 here.
Phoenix