Certain types of women's clothing, however, continue to feature back closures out of tradition. Formal wear such as evening gowns and wedding gowns, for example, frequently fasten at the back. Many summer dresses, especially in petite sizes, feature back zippers, though in recent years, fabrics that can retain these styles without the use of a zipper have been developed. Back closures also remain commonplace in some everyday garments that can be donned backwards and then reversed, such as skirts and bras, or that can be slipped on/off without the need for a closure, where they only are present for stylistic purposes.