Step 1: Preheat Your Curiosity
Before diving into the explanation, take a moment to really look at your towel:

Lay your towel flat on a surface.

Notice the horizontal band or raised lines, usually near each end.

Observe how this section differs in texture from the fluffy middle.

This band might look decorative—but like many everyday items, it serves multiple hidden purposes.

Tip: Almost everyone owns towels with these lines, yet few know why they exist.

Step 2: Add the Structural Base
The most important function of towel lines is structural reinforcement:

Towels are subjected to repeated washing, drying, twisting, and pulling.

The decorative band—technically called a dobby border—helps stabilize the fabric.

This tighter weave prevents the towel from stretching unevenly over time.