Paul recently bought a pair of Aftershokz Trekz Air headphones. Leo says they are fine. Not great, but good enough. Paul complains though, that after ten minutes, the sound drops and gets garbled. Leo says that's a Bluetooth issue that's likely specific to that model. Worth returning or exchanging. Leo says he has the older version, which works well. He may want to try the Aeropex. At the end of the day though, Bluetooth is just terrible, because it handles far more bandwidth than it was designed for.