Hi jovan,
[quote]Hi Jovan,
You can ask as many questions as you need to be comfortable with a purchase.
The latex is going to be the Talatex latex from a company called Latex International. It is a 40% natural and 60% filler blend.
To give you an idea on the fillers it is things like sea shells
…
So this means that we are getting less than 1.5" of natural latex. And I don’t know nothing about sea shells but doesn’t sound very attractive.[/quote]
The Talalay latex that is made by Latex International uses “about” 30% natural rubber and 70% synthetic rubber so the entire 3" layer is made from a blend of natural and synthetic latex using the Talalay process. Their latex does have some Feldspar (similar to crushed chalk) filler material that they use in their latex formulation which is used to add additional firmness to the latex in different firmness levels. All 3" of the layer are a high quality blended Talalay latex material and it is a higher cost material than the synthetic latex used in the Myrbacka.
Based on your calculation method … the Myrbacka would have 0" of natural rubber but of course you can’t separate out the natural and synthetic rubber in a blended latex layer since they are mixed together as a liquid before they are co-polymerized together.
There is more about the different types and blends of latex in post #6 here.
They both have more than 1.5" of latex. The upper layers of a mattress are the weakest link in terms of durability so if you are in a more normal weight range the density of the support layer would make little difference in the useful life of the mattress (you can see the foam quality guidelines here that I would suggest using). The most important criteria that I would use to decide between them would be based on which type of latex you would prefer and which one you believe you would sleep best on and would be most suitable for your body type, sleeping positions, and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences).
Talalay latex is generally the most breathable of all the different foam materials so it would tend to be more temperature regulating and sleep cooler than other types of foam materials or other types of latex. There are also other variables that can affect the sleeping temperature of a mattress though besides just the type of foam that is used in the comfort layers that can have just as big an effect on the sleeping temperature of a mattress (including the type of mattress protector you use and your sheets and bedding). There is more about the many variables that can affect sleeping temperature in post #2 here.
Phoenix