custom molded earpiece for CEP  

They're a must for comfort. I had mine made by westone. Full shell. Have a mold made by local audiologist and send them in. Also make sure you get the real deal CEP from cep-USA. You have to email them but they have amazing customer service. I learned a lesson about knock offs from Gibson and Barnes that failed constantly.

the foam tips were very uncomfortable for me. Switching to CME has been great and I can't fly without them. Some people have a hard time getting used to them but stick it out if you do. it's worth it.