Invisafil by Wonderfil. Box of (6) 400m spools. Our finest thread line, InvisaFil, is a remarkable silk-like 100wt, 2-ply cottonized polyester. This ultra-fine but surprisingly strong thread has cotton-like characteristics and negligible stretch while also feeling soft in the hand. InvisaFil makes for super low bulk stitches and virtually Ã¢â¬ÅdisappearsÃ¢â¬Â, making it the ultimate choice for English paper piecing, delicate lace designs, fine fabrics, creating texture when micro quilting, or whenever you donÃ¢â¬â¢t want your stitching to show. It is available in 60 subtle to bright colours with a slightly glossy finish, so you can choose how much want the thread to show (or not at all)! Usages: Stitch in the ditch, top and bottom thread, bottom thread for delicate machine embroidery, hand and machine appliquÃÂ©, free motion quilting, stippling, English paper piecing.