 Each set of bags should be distinguishable from the other; different colors work well.The American Cornhole League's rules call for double-seamed fabric bags measuring and weighing Although bags used to be filled with corn kernels (hence the name Cornhole), bags are nowadays usually filled with plastic resin or another material that will maintain a consistent weight and shape.Bags are usually dual sided, with each side of the bag being a different material that reacts faster or slower on the board.