Hi kurniadion,
You can see some of the specs of their mattress here.
From the top down the foam layers include …
5/8" of quilting foam (polyfoam that is quilted to the cover). This is typically a lower density material but since it isn’t more than “about an inch or so” thick it normally wouldn’t have a meaningful effect on the durability or useful life of a mattress unless there are also other layers in the mattress that are lower density as well.
The top comfort layer is a thin layer of a soft solid gel material that covers the middle section of the mattress and would add some additional firmness and support under the heavier part of the body (hips/pelvis) and would provide some cooling benefits in this area of the mattress as well. It’s a good quality and durable material.
The next layer down is a 2" layer 4 lb convoluted gel memory foam. Convoluting would reduce the durability of this layer to a “functional equivalent” that was less than 4 lb density (a solid layer will generally be more durable than a convoluted layer that is the same type and density) so this would be a reason for caution (particularly in combination with other lower quality/density materials). You can read a little more about convoluted layers in post #2 here.
The next layer down is 2.5" of 5 lb memory foam. This is a good quality and durable material.
The next layer down is 2" of polyfoam
At the bottom of the mattress is 5.5" of polyfoam.
They told me in a chat that these bottom two layers are between 1.5 lb and 1.8 lb density (see post #2 here). When a manufacturer gives you a density range like this I would assume that it is the lower of the two densities (it’s a much less risky assumption). These are also the layers they were referring to when they told you they were using 1.3 - 1.8 “ILD” but the person you were talking to clearly didn’t know the difference between ILD and density (they told me “units” which also doesn’t make much sense). If they are now telling their customers that the density range is 1.3 - 1.8 lbs density (instead of 1.5 - 1.8 lb density) then this would either be a mistake or it would be an even lower quality/density material than they told me and if this is correct then I would assume that they were the lower part of the range they gave you which would be even worse. Their customer service representatives seem to commonly mix up their terminology and don’t appear to be particularly knowledgeable about mattress materials.
You can see some comments about “so called” bio based or plant based foam materials in post #2 here and this is more about marketing than anything meaningful and is somewhat misleading because the polyfoam and memory foam is still mostly petrochemical based … not “bio based”.
You can also see some comments about their so called “natural thistle” fire barrier in post #4 here. The thistle is just the source for the cellulose that is then processed to produce the viscose/rayon in their fire barrier.
If their “organic cotton” cover is similar to the “organic cotton” cover used in the Saatva mattress (which it likely is since Saatva is their sister company) then it only includes 40% organic cotton blended with polyester.
In other words there is some greenwashing happening in their descriptions (although there are many other manufacturers in the industry that also have some misleading descriptions that imply that their materials are more “natural” or “green” than they really are)…
Phoenix