Some of the funnier suggestions included the ”face/butt delineation line” or ”racing stripes” designed to make towels dry faster. But for those seeking real answers, the mystery was quickly unraveled.
So, are the lines on your bath towels simply decorative choices made by designers?
It turns out the line on your towel, known as the ”dobby border,” serves several important purposes. The most significant is to strengthen the towel, which helps improve its absorbency and prevents fraying after repeated uses and washes.
”Towel Hub” explains, ”Absorbency is one of the most important qualities of a good towel, but achieving the perfect balance between thickness and performance can be challenging.”
The dobby border helps maintain an even structure, preventing the edges from becoming too bulky. This ensures the towel remains soft, lightweight, and efficient for drying.

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