PELLON-Peltex Sew-In Interfacing. Use this extra-firm stabilizer on craft projects in place of cardboard or foam core to help shape boxes, cornices, folders, frames, and other such items. It is made from 100% polyester and is both machine washable and dry cleanable. This package contains one 20-inch by 10-yard piece of sew-in interfacing. Available in black or white (each sold separately). Made in USA.