This non stretch fusible interfacing is the extra layer that will give your finished garment shape and support in detailed areas. This heavy weight fusible interfacing has a resin coating on the back that fuses to the fabric when steam, heat, and pressure are applied. To use, place the interfacing with the coated side on the wrong side of the fabric. Cover the entire area with a damp cloth. Press each area for about 12 seconds, being careful not to move the iron.