(You may need to zoom in a bit to see the glue because it is an opaque white/clear color. Im not working out or sweating profusely in them. For some reason, these are not as comfortable as the Karin style. I honestly dont feel the Viper is good value for money. 😞Edit #2(04/17/20): changed set-up to LG V60. Once the speaker needs to be charged, a friendly voice says "battery low. It’s not very thick, which is great for out Texas weather. The door bell was ringing just now and I didnt even hear it! In the case of the P4, its one after another. However, they broke after 45 minutes of wear, most of it while she was sitting eating dinner!