10. Is it comfortable to wear the FD11?

It uses a bionic design of conch, the cavity is not large, and the overall shape is rounded. Moreover, there is a shark-fin-like design, so it is comfortable to wear.

Why cannot certain individuals wear it firmly?

There are many reasons, such as the auricle, ear canal, and specifications of ear tips. Unless they are custom made, there is no way for them to fit everyone. It is suggested to change the ear tips with other specs and designs if the FD11 doesn’t fit your ears.