Most people don’t realize that the lines on bath towels are more than decoration—they’re part of the towel’s smart design. As the article notes, “these lines may initially appear to be just ornamental,” but they serve important functions.

The lines are created using specific weaving techniques to boost absorbency and comfort. They increase the towel’s surface area to help it soak up more water and dry faster by allowing better airflow.

Some towels feature thicker, raised “tread lines” that “strengthen the towel’s structure and keep it from fraying.” These also help towels hold their shape after many washes.

The common dobby weave—a tight, geometric pattern—helps towels stay sturdy and prevents stretching. “The towel will maintain its original shape even after prolonged use,” the article explains.

Dobby borders, often found at the towel’s edge, are denser and stronger to stop fraying and keep the towel intact. They also give the towel a neat, finished look.

In short, the lines on bath towels are “the result of intricate weaving methods” that enhance durability, usefulness, and design—making your everyday towel smarter than it seems.