CNET has a review of the BlueAnt Wireless X3 micro and writes - “On the back of the headset is an earbud that rests in the ear canal for a more secure fit. The headset comes with an optional ear hook, which you can adjust to fit over either ear, and removable foam earbud covers for comfort. If you choose to wear the X3 micro without the ear hook, a removable soft-gel earbud cover provides extra comfort and security. Even without the earbud covers, however, we found the size of the earbud to be a little larger than the ones we’re used to, so it may feel a little uncomfortable for those with smaller ears.”

Read more about the BlueAnt Wireless X3 micro Bluetooth headset