Pro-Shot Products 13/8-500: American Cotton and American Design come together to form ac cleaning patch with a high thread count with tightly woven material along with our double napped on both sides creates a superior cleaning patch that have become known worldwide for their unparalleled cleaning ability. Nothing surpasses 100% cotton flannel fabric for purposes of absorbing foreign matter and residue, and in turn carry it through the Bore with the least amount of abrasive contact to the barrel\'s rifling.