Guterman Maraflex… what a great product. As with all Guterman there is the high quality which really does make a difference to sewing. Maraflex has stretch for any kind of topstitching on stretch garments. Instead of finishing off with a zigzag or lightening stitch. It’s possible to just do a standard stitch but with stretch. So if you don’t own a cover stitch machine but like that single /double/ triple top stitch line then this is the product. Simply use as any other Guterman thread. ( I lengthen my stitch to 3.5 but that’s purely a choice)