Mattress Research

Over the years I/we have slept on many different mattresses including `Casper`, `Simba`, `SilentNight`, `Emma` and _several_ `IKEA` models. So far the best we've found are an `IKEA` `Matrand` and `Emma` mattress. We _returned_ our `Simba`. 👎
We are only interested in Mattresses that are made from `Memory Foam` or `Latex` because they are _objectively_ better.

`Matrand` is still available in the `US`:
https://www.ikea.com/us/en/p/matrand-memory-foam-mattress-firm-white-00272406/

But discontinued in `PT`:
https://www.ikea.com/pt/en/search/?q=matrand

There are quite a few options form `IKEA` in `PT` in the size we want:
https://www.ikea.com/pt/en/search/?q=mattress%2090x200

Yes, the Bunk Bed Frame in the search results is covered by our research: https://github.com/dwyl/bunk-bed/issues/1#issuecomment-1845471391

If we filter the results for the criteria:
+ [x] Memory Foam
+ [x] `200 x 90cm`
+ [x] _Medium_ firmness

We are left with the following 2 options:
https://www.ikea.com/pt/en/cat/foam-latex-mattresses-24823/?filters=f-firmness%3A47473%2Cf-typed-reference-measurement%3A90x200%20cm_mattresses

The `ÅFJÄLL` and is `12 cm` thick and `€89`:
https://www.ikea.com/pt/en/p/afjaell-foam-mattress-medium-firm-white-40568646/

> _Personally_ I find it _very_ difficult to believe that this is even _minimally_ comfortable.

By contrast the `ÅKREHAMN` is `20 cm` thick and `€259`:
https://www.ikea.com/pt/en/p/akrehamn-foam-mattress-medium-firm-white-40481672/

`ÄNGSKORN` are the mattress protectors we use on our `IKEA` mattresses `€39`
https://www.ikea.com/pt/en/p/aengskorn-mattress-protector-90461997/

For reference the `Emma One` _with_ Protector in `200cm x 90cm` is currently available for `€267,62`

`Emma` Mattress Comparison: https://www.colchaoemma.pt/compara-colchoes/

The `Emma` `Original` which is `25cm` thick with protective cover is currently `€339`
https://www.colchaoemma.pt/emma-original-capa-protetora/

The protective cover from `Emma` is `€74`: https://www.colchaoemma.pt/capa-protetora/

@iteles what are your thoughts on mattresses?
Which company is more likely to give us a volume discount if we buy **`30`** units? 💭

The _reason_ I'm opening this issue now is to figure out what ***`height`*** of mattress I'm designing the bed for.
I'm going to assume `20cm` but plan for up to `25cm` to accomodate a _range_.