Audiofly AF1120 MK II
The AF1120 MK II is the flagship IEM from the company called Audiofly. It uses six balanced armature drivers, and it's priced at $649.
IEMS
ADV. EARTUNE FIDELITY U Tips
ADV EARTUNE FIDELITY U are hypoallergenic silicone IEM tips that promises ultimate sound isolation, comfort and no changes to sound whatsoever. Pack of 3 can be picked for $25.