Lesley,
The back is just plain black material from an old skirt. I have put a button opening so that the cushion pad can be taken out but made a feature of the buttons as they are red. You push the rugs through with a bodger and it isn't too difficult although you do need to grip so it would depend on how good you are at that. If you can find someone close to home with a bodger that you could try first that might help.
Suziequeue,
Its made from t-shirts that I got it from a charity shop. I knew the design I wanted to make as its from a book and had in my mind to do bluey/greens but when I saw the black and white top it just called out to me and the rest then became obvious.