Birch Dress Zip Mustang 294 Nylon Choose size from drop-down menu. Suitable for dresses, skirts, jackets, make-up bags, coin purses, pencil cases and bags. Birch zips are soft and flexible as well as economically priced for all your sewing and craft projects. They come in a large range of colours and a variety of sizes. With so many free tutorials and patterns available, why not try sewing a make-up bag or coin purse for someone special?