I?m too lazy to return, so I will wear in/out of yoga for now. If youre using Android. The amplification is strong and clear, making it perfect for indoor and outdoor use. There is also a decent level of noise cancelling going on. Im raising my rating to a full five stars. Unfortunately i dont have an oven large enough to powder coat these myself, otherwise I would. I ordered another model and got a full size over my normal fit. Die Hülle an sich ist super. great for casual listening when cooking in kitchen or working the garage, while still being able to hear others talk. Delighted to find this style in my size at a good price.