Hi, mine is the EZFold from 1800wheelchair.com. It is airline approved, which allows me to ride it up to the door of the plane, fold it up and take the keys and they take it there along with the baby strollers, etc. It is a 3-wheel model and can go pretty fast so the driver has to take care, but there are 4-wheel models at that site, too. Their customer service is very responsive.