A recent social media debate has sparked curiosity about the mysterious lines often found on bath towels. While some have humorously suggested that these lines serve as “face/butt delineation markers” or even as “racing stripes” to help towels dry faster,

the truth behind this design element is far more practical and essential.These decorative yet functional lines are part of a weaving technique known as a “dobby border.” This design feature plays a crucial role in maintaining the towel’s durability, preventing fraying over time,