I thought I might use this when traveling abroad on a plane, but (for sleeping) I didn't sleep at all on the outbound and return flights, lol. So I'm selling it! Brand new, unused! A friend recommended it to me, and apparently, they used this and didn't wake up once while sleeping on a flight! I'm not going, but it seems useful for protecting babies' ears at outdoor festivals and live concerts! I'm open to price negotiations, so feel free to leave a comment! ^_^