InvisaFil 100 wt Cottonized Polyester Thread - Antique WhiteWonderfils finest thread line, InvisaFil, is a remarkable silk like 100 wt, 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 "disappears", making it the ultimate choice for English paper piecing, delicate lace designs, and fine fabrics, creating texture when micro quilting, or