An Oxford shoe is characterized by the shoelace facings that are attached under the vamp, a feature termed "closed lacing". This contrasts with Derbys, which have shoelace eyelets attached to the top of the vamp. Originally, Oxfords were plain, formal shoes, made of leather, but they evolved into a range of styles suitable for formal, uniform, or casual wear. Oxfords are now made from a variety of materials, including calf leather, suede, and canvas.