This is important. I choose a piece of camouflage material because I had it and didn't have the tools to make holes in my piece of leather i wanted to make it out of. I soon discovered that this piece was likely to be too flimsy and extremely frustrating. However rather than give up i decided to finish and try it out and see if I even liked it.
So choose a piece of cloth big enough to be double the width of the items you chose combined width. It should be stiff, like a piece of denim or thick nylon.