My preference is either rawhide or sinew; rawhide is a lot easier. I used the rawhide dog bones on a couple of bows but it takes a lot of sanding to get thin. I discovered antelope rawhide (Moscow Hide & Fur) and haven’t found any rawhide that comes close to its ease of use and performance, little if any thinnig is needed. However, I must admit, after finding a good source for bison back sinew I now use sinew exclusively when backing a bow.