Love the fact that you can use only one ear bud and still get good quality sound. I have been trying to find the usbc blocks for the new fast charging phones but they are usually so expensive. These are all rubber so they won?t get stinky after wearing everyday in the hot sweaty feet summer. The sound quality exceeded my expectations and so far the battery life has been great. Also surprising was the part was available on Amazon cheaply, I thought this cant possibly work. - Would have been 5 stars but for this. I purchased these because I needed some new shoes. I used these primarily for working out since they have no wires. gut geholfen und jetzt läuft alles besser . If you wear larger athletic shoes than regular shoes, I would go with your athletic shoe size.