Penelope’s Perfect Blends is colour curated for the ultimate collection of threads that virtually disappear into your fabric. InvisaFil™ is an ultra-fine 100wt thread that is a remarkable silk-like cottonized polyester, strong enough to quilt with in the machine for incredible detailed work, or stitch with by hand for super flat, invisible English paper piecing. You can conceal your appliqué stitches like never before, whether you’re sewing with it by hand or in your machine. Available in an assortment of six neutral shades made to match your fabric, rely on Penelope’s Perfect Blends to give you a professional touch with any project technique.s.