What is the purpose of fabric strips on bath towels

Every day, after showering, we automatically grab our bath towel to dry ourselves. But have you ever paid attention to the strips of fabric often found at their ends?
Many people think they're purely aesthetic, but in reality, these strips serve a much more useful purpose. And if you choose your towels wisely, it could even save you from having to buy them too often!

A detail that we no longer notice... but which is important

Invisible but effective protection
These famous strips of fabric, generally smoother and less thick than the rest of the towel, have the main function of preventing fraying.