Fusible interfacing for feather to midweight fabrics the # 1 selling interfacing in the market. Great for apparel, Tshirt quilts and anywhere some support is required. 100 Polyester. Has some stretch. FREIGHT INTENSIVE Billable transportation charges for freight intensive items will be the greater of the dimensional weight compared to the actual weight. In addition to transportation charges, freight carriers may assess an additional oversize charge per package.