Etymotics ER-4P or ER-4S. The ER-4S need an external amp. These are ear buds that offer the absolute best in noise cancellation during air travel, much better than any noise cancellation headphones. They rival the best headphone period regardless of price or type. The best thing about these are that they take up absolutely no space fitting in the palm of your hand. Check them out and ready about them at headphone.com
