I am looking to purchase an ultra lightweight wheelchair for my son. He is 24 with autism and has toe walked all his life. This has caused mobility issues when he has to walk for extended periods of time. We currently use a transport chair but it is getting hard to push. He is around 250 lbs and I just need something that rolls easier and smoother. I also cannot lift something that is super heavy. Does anyone have experience with some of the ultra lightweight chairs. I am looking at the Feather chair. There are two options the regular a wide option that holds higher weights (350). I am also looking at the So Lite and Karman ultra lightweight. We would be using it when going shopping for extended periods but mostly when we go to Disney or other similar vacations