seat belt
seatbelt

Right now, both of you get your seat belts on.

Then she opened her seat belt and turned to him.

Never drive with more people in your car than you have seat belts for.

And most people in the 1970's did not use seat belts.

She pulled the seat belt around her and looked up at him.

Now wasn't the time to worry about his seat belt.

The police did not know whether George had been wearing a seat belt.

I mean, there's no reason why that man didn't put the seat belt on his little boy.

She got in, set her seat belt, and turned the key.

"I want to know what happened to the seat belt."