Pellon SF785 Woven Sew-In Fabric White 20 x 10 Yards by the Bolt - 1 Pack. Pellon SF785 Woven Sew-In is an all purpose woven sew-in interfacing for light to midweight fabrics. It adds body and crispness to a variety of projects including shirts jackets accessories and ties or can even function as a stand alone fabric. It is great for use with various fabrics such as oxford cloth chambray poplin and calico.