Please provide me with the design you want me to write content about. I need to know what "sofa 11" refers to. For example:

* Is it a specific sofa design? If so, please provide me with any details you have like the name, brand, or a picture.

* Is it a design concept? If so, please describe the concept and its key features.

Once you provide me with more information about "sofa 11," I can create engaging content about it for you.