Pellon 860F Ultra Weft Fabric Interfacing. Color: White. 20 x 10 Yards by the Bolt. 1 Pack. Pellon 860F Ultra-Weft is a fusible weft insertion interfacing for traditional soft tailoring and designer drape in lightweight jackets and coats. It was developed for fabrics such as lightweight wool cashmere camel hair and crepe. One-sided fusible application and sewing machine safe. Color: White. Sold by the bolt. Fiber Content: Acid-Free 85% Rayon/15% Polyester.