They have a inside leather lining. I dislike that sensation entirely, but regular earbuds just dont stay in my ears well, especially when jogging or working out. If youre used to the chairs at the now defunct "Gyms" during "Shelter in place," then youre in for a doozy. If these earplugs do not need to move when put the earbugs back to charging case, that will make these earbugs perfect. Also as you can see in the pic, whatever a. One thing I was pleasantly surprised at. My next pair of these will be purchased from a more reputable place like Nordstrom or Macys. All of the frequencies are detailed and clean from highs to lows. That was a lot of cable to get in my pocket every time I got up from my desk. Im lucky that I wear a size 8 womens shoe and so I could get the equivalent of a mans size 6 - the smallest that they make.