Hi John667,
The Presto was designed by MFC and is made exclusively by Natureās Embrace.
Here are the details of their organic Dunlop latex firmness options:
SOFT = 20 ILD approx. 65 kg/m3
MEDIUM = 30 ILD approx. 75 kg/m3
FIRM = 40 ILD approx. 85 kg/m3
At the factory level they use both ILD and density to formulate the firmness. This is explained in detail by Natureās Embrace in this article on The Science of Sleep
By placing a softer layer below a firm one you are creating a new sleep surface. Some sleepers enjoy a firmer sleep surface with a little less support, which creates a softer pocket under the hips and shoulders and therefor reduces pressure points with a firmer sleep surface.
Yes, you can choose to have 2 x medium layers if you want, however in our experience, itās better to have 2 x soft layers as this gives you more soft options. If ever you need to firm up the mattress, you simply move up the 4" firm core by placing the softer layers under it, and only use a 2" layer of soft or medium over the firm core.
So yes, the Presto offers 9 comfort and support options all in the same mattress. Please see the animated gifās on this page that show you how to adjust the Organic dunlop customizable mattress from soft / medium / firm.
The advantage of a customizable mattress is that if ever you need to soften up the mattress even more, you can buy soft layers at cost for up to 1 year after your purchase. You canāt do this with a standard mattress.
The way we quote firmness has nothing to do with the fact that we only use pure organic latex. The reason is simple, our latex is GOLS certified:
The only way to guarantee a latex rubber is free of additives is through GOLS (Global Organic Latex Standard) certification.
Under the GOLS content standard all latex rubber must:
1- Contain at least 95% organic latex content
2- Not contain any synthetic latex
In addition to the purity and performance standards GOLS standards also includes many other important health and social guidelines.
Some of the other important parameters included in the certification include:
VOC and harmful substance testing
forest stewardship practises
waste and pollution management
water management regulations
renewable energy requirements
living wage guidelines for workers
child labour is prohibited
When taken in totality, no other certification ensures youāre getting the full health and performance benefits that latex offers while protecting the health of our planet, workers and you.
Hope this helps you find the mattress thatās right for you!
all the best