First of all....welcome to NeuroTalk! I'm so sorry for your pain...and not having a diagnosis to go along with it. What have you been tested for?

I saw a lightweight chair at Rite Aid pharmacy today. There are also gel pads that you can purchase for wheelchair use. My Dad had to have one because he was in his chair all the time and the pressure on his backside could have caused sores. He said it was like sitting on an air mattress - apparently it was very comfortable.

If nothing else do a google search online for lightweight wheelchairs and see what it comes up with. Good luck!