boom the backing is fabric cotton cloth. Will B. cut the tree, and chain sawed the logs, and reduced them to staves. He said the wood would not split easily much like Elm.. He knows I like to play around with different wood to make bows so he gifted me with a stave. Pat B from what I can gather from making this bow Black Gum works pretty well as a bow wood.. The bow holds close to 1 inch of reflex. Takes rather nicely to heat treating, and I am pleased with it's speed. Will B., and I make bows together some times, and he has more staves. He wants to try a 68 inch recurve for the next bow made from this wood. Then we will make more bows ,and get a better idea of what can be done with Black gum. So far not bad at all. Thanks guys for your kind words.