In many sports, being able to get good footing and traction can affect results. The quality of the field has an impact. Football players will wear different cleats if the field is grass or AstroTurf. Runners used to runon clay, cinder, dirt, sand or grass, which is easier on the body. More modern surfaces include a combination of asphalt and rubber, all-weather tracks which uses latex or rubber surfaces, and polyurethane, all with different effects requiring different equipment.