Hi smichaels,
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets your criteria and the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Chicago, IL area are listed in posts #2 and #4 here.
I would suggest making sure you include My Green Mattress/Quality Sleep in your research. They are a member of this site which means that I think very highly of them and that I believe they compete well with the best in the industry in terms of their quality, value, service, knowledge, and transparency.
I wouldn’t step foot in Bloomingdales and Macy’s or any other store that focuses on major brand mattresses or that won’t be able to tell you the information you need to know about the materials and components inside their mattresses.
Phoenix