In fact, the only slight downsides are the paucity of ear-tips (four set of silicones in total) and the cloth bag offers little protection when stored. And when it comes to the ear-tips, the AU-Flex-ANC is not a ‘bastard’ size so finding replacements should be easy.
I’ve been using the AuSound AU-Flex-ANC a lot recently, because they are small, light, have a good battery life and sound great. The noise cancellation is effective too. I had hoped to check out their ability to cope with in-flight noise, but something nasty got in the way. I think they are good enough to still be useful when we all start flying again!
Type: Wireless neckband earphones
Frequency Response: 20Hz–20 KHz
Impedance: 16 ohms
ANC Depth: 20 ~ 25dB
Weight: 36 / earphone
Total Battery Life: 22 Hours/10 Hours in ANC mode
Manufactured by: Ausounds