After suggestion from someone who was happy with Aftershokz, I researched them and decided on the Air model. 99 Bikes had a very good deal on them, and the Indooroopilly store had them ready to pick up almost immediately after ordering. In use, the Air is not loud and if there is traffic noise, then they are overpowered. Plugging an ear from outside noise can be a workable compromise and they provide a pair of ear plugs. On the road in the evenings, volume is fine and no surprises from something behind you. They are light and secure compared to all the in-ear headsets I've used over the years. After a couple of hours, the pressure gets a little annoying. I've had no issue with battery life for 2-3 hour walks, and recharge times have been quick. Really pleased with my purchase.