Pellon 70 Peltex Ultra-Firm Sew-In is an ultra firm, smooth, heavyweight, sew-in stabilizer for extra support. It is excellent for accessories, crafts, home decorating, and quilting. Peltex is easy to sew, even when sandwiched in between other fabrics. It will not flatten or distort with steam pressing. It has no grain and can be cut in any direction. 100% Polyester.