The components of a band uniform are numerous. Common design elements include hats (typically shakos, pith helmets, combination hats or other styles of helmets) with feather plumes, capes, gloves, rank cords, and other embellishments. The USC Spirit of Troy Marching Band and Troy University's Sound of the South Marching Band wear traditional Trojan helmets. It is also common for band uniforms to have a stripe down the leg and light-colored shoes, or spats over dark shoes to emphasize the movement of the legs while marching. Similarly, uniforms may feature additional components which highlight movement of the upper body, such as the "wings" worn by the University of Minnesota's marching band to highlight flanking movements on the field. Competitive bands, however, many times opt for matching uniforms, especially pants and shoes (usually white or black) to hide the visual effect of members who are out of step as seen from a distance. Occasionally, a band forgoes traditional uniforms in favor of costumes that fit the theme of its field show. The costumes may or may not be uniform throughout the band. This kind of specialized uniform change is usually confined to competitive marching bands.