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I was planning on getting some cans from Kokoon, before I lost muh job. They're over-ear, noise-cancelling cans that are designed with a low-profile, cushioned cup specifically for comfort when sleeping, even on your side. They also have an EEG sensor built in, so they play music or white noise, scanning your brain and lowering the volume as you fall asleep. They also do the opposite, playing music when you get to the lightest part of your sleep cycle as you near your chosen wake-up time.