Specially manufactured to be used in industrial sewing machines. The synthetic Amanda Thread (100 % Polyester) provides the strength and the option you are seeking. A thread 30% stronger than cotton and oil treated to avoid overheating during high speed continuous sewing. All cones are packed in plastic bags for their protection. The great finish, the absence of ties, and the uniform thickness of the thread prevents breaks thus saving down time. Rimac carries a large inventory in all sizes for fast delivery service.