Use Pellon's ShirTailor in shirt collars and cuffs to help stabilize them. This interfacing helps to give materials a crisp, smooth, professional look. Ideally, ShirTailor Fusible Interfacing is used with light to midweight woven and knit fabrics such as oxford cloth, chambray, gingham, flannel, and poly-cotton blends. Pellon's ShirTailor is both fusible and non-woven and has both a lengthwise grain for stability and a crosswise stretch for shaping. ShirTailor is made of 100% polyester, is sewing machine safe, and measures 20" wide, making it a necessity for any serious sewist. See instructions on how to use this interfacing here. You can also download one of these free patterns (Vintage Reversible Apron, a T-Shirt Quilt, Essential Clutch) from Pellon that uses the Shir Tailor interfacing.