While we’re talking about towels, is there any reason why almost all towels have a narrow band of non-towelling material a few inches from one end. Sometimes it’s fancied up with a bit of embroidery or something, in which case I can see the purpose might be purely decorative, but usually it’s just a section of plain old fabric, like the ones in this image.
What’s it for? Is it just one of those design things that has stuck, because “that’s what towels look like”? Or is there some practical reason for it?