You probably own a perfectly good set of earphones that you use regularly.
You have likely also tried to use the headphones that airline companies hand out during flights.
Let’s just say they’re not top notch (can speak for business- or firs class). Other airlines let you buy an adapter thing for 5 bucks or so.
But why not save both money and resources and simply use your own earphones or headset – no adapter needed!
For the last 5 years or so, that has been one of my favorite travel hacks!