Depends on how you go with sticking things right into your ear, me being a sensitive soul I have a hard timesticking those things in. If your an old fart you have trouble getting them in because of the excess hair stickin out your ears as well!!!!!!!!!! Another factor is how much flying you do, your ear might be able to handle 3 or 4 hours with those things stuck in, try it for 12 and see how goes it. For me ANR works well and is comfortable, not CEP.