Apart from the silicone eartips in the box you can also use the ones from Comply™:
- for Byron: see overview at Comply™
- for Byron BT: see overview at Comply™
- for Byron BTA: see overview at Comply™
Some users have the problem that silicone eartips easily slip out of their ears. In this case, foam eartips can help as offered by Comply™.
Please note, that beyerdynamic doesn't sell such eartips of Comply™ by themselves.