Hi Misbasnji,
I’m assuming you’re looking for the better manufacturers in the Chicago area?
If that’s the case … one of the best quality/value manufacturers in the country is in Chicago and is a recommended member of the site.
The Chicago list is in posts #2 and 4 here.
A forum search on MyGreenMattress or Qualitysleep (you can just click these) will bring up many comments and feedback about them.
Hope that helps 
Phoenix