These are designed for those ladies in TV dramas shown 'at the gym' with one hair out of places and no signs of sweat. On the other hand for blokes training properly, well I had sweat in my eyes after 15 minutes. The band was soaked to capacity. Too thin, not enough toweling material to work well. And I wasn't training that hard.
I will open it up, stick a couple of layers of old towel into it, sew it back up again, and it will work fine.