United Airlines is unveiling a new class in 2017 called Basic Economy, and it restricts carry-on baggage. In short, if you’re traveling on this fare, you won’t be able to bring a full-size carry-on bag on a flight.

This new, cheap fare will mean you have to check your bag rather than put it in an overhead bin. United will only allow Basic Economy passengers one carry-on for stowing under the seat in front of you.

Passengers with these tickets will also be assigned seats on the day of departure, so you’re not likely to be able to sit next to the person you’re traveling with.

It’s all part of United’s master plan to generate $4.8 billion in earnings by 2020.

“As we approach the new year, our operations are running well, our employees are more energized than ever, and we are ready to unlock United’s full potential,” said Oscar Munoz , CEO, United Airlines, in a statement. “Today, we are talking about what’s next for United. We now have the strategy and organization in place to be the best airline in the world – for employees, customers and investors.”

United hopes the new class will also simplify the boarding process by cutting the number of passengers who try to stow luggage overhead.