No idea about the band, but I am sure it has dual purpose. One is to keep the thing on your head, and perhaps more sensors.

Patents are given based on invention, and it could be very silly things applied in a different way. Don’t focus too much on patents, they are mostly for marketing purposes and to have a sort of benchmark for non-tech users. Most of the things are recycled tech applied in new ways. Or slightly more optimized way for doing what we’ve done in the past but at more cost. 🐶🐾🫡