Long staple Egyptian cotton is the best in the world! The 12 weight is a decorative thread and is the thickest thread in the Mako range. 2 ply thread. It is ideal when a very defined machine quilting stitch is desired. 100% mercerized cotton. Superb for art quilting when heavier thread effects are desired . Beautiful on linen and denim fabric . Use a 90/14 topstitch needle.