This article clears up a surprisingly common curiosity with a satisfying and factual answer: those mysterious lines on towels are called “dobby borders,” and they serve real, practical purposes beyond aesthetics.

Here’s a quick breakdown of what the dobby border actually does:

Prevents fraying – The tightly woven strip reinforces the ends of the towel, reducing wear and tear from washing and use.

Maintains structure – It helps the towel keep a uniform shape, which is important for both longevity and appearance.

Controls absorbency and thickness – It allows manufacturers to balance absorbency with softness and weight.

Aesthetic value – It gives towels a finished, elegant look (and a folding guideline too).

So, while some joked about “butt/face zones” and “racing stripes,” the dobby border is a subtle blend of form and function—not just a decorative flourish.

Would you like a visual diagram showing the anatomy of a towel, including the dobby border?