This is like one of those “guess the object” games you used to see on TV where they would gradually zoom out from a close up shot of a familiar object.
Whilst the post title (and the previous post) is perhaps a give away, if you were looking at these shots out of context, they might have had you guessing. I deliberately left the section on the right of the first shot as a clear clue for anyone who thinks it is not immediately obvious what the the image shows.
The last shot is in a higher resolution so that you can get a good close look at the pattern of texture in the fabric. Click on the image to enlarge.