I am going to be making a bag and i dont know what type of material is best. preferably waterproof. i don't mind the colour because I will be putting fur over the top of it, but i want it to be sturdy and strong.
can anyone give me any advice?

if you go to a fabric store, check the upolstery section. the patent leather and plastic-y stuff that i guess you can put on couches would be water proof and sturdy.

The old style vinyl table cloths, I think they are called oil cloths.

K/x

Rummage at a charity shop for one that suits and re-purpose it!