What is the purpose of the fabric bands on bath towels?

Every day, after showering, we instinctively grab our bath towel to dry off. But have you ever paid attention to the fabric bands often found at their edges?
Many people think they are just decorative, but in reality, these bands serve a much more useful purpose. And if you choose your towels wisely, you might even avoid having to replace them too often!
A detail we overlook… but one that matters
An invisible yet effective protection
These fabric bands, usually smoother and thinner than the rest of the towel, primarily prevent fraying.
Why is this important?