One of the main reasons for these lines is to boost absorbency. The texture adds surface area, helping the towel soak up more water. The lines also help it dry faster by creating airflow channels, which reduces the chance of mildew.

Lines can also act as visual guides. They make it easier to fold or hang towels neatly and help keep the towel’s shape over time.

Some towels have raised lines called tread lines. These are designed to make the towel stronger and more resistant to wear and tear. They help keep the towel thick and soft, even after many washes.

Many towels use something called a dobby weave. This creates small, patterned lines that reinforce the fabric and prevent stretching. It also keeps the towel looking neat and lasting longer.

At the ends of towels, you’ll often see dobby borders—the tightly woven bands. These add style but also protect the edges from fraying and unraveling.

In short, the lines on towels are all about function and durability. They make your towel more absorbent, longer-lasting, and easier to use—turning a simple household item into a well-crafted essential.