Racer's swimwear is a term used to describe the type of swimwear worn by competitive swimmers and other athletes. Speedos, which is a 7-letter word, is the most common type of racer's swimwear. It is a form-fitting garment that is designed to reduce drag and increase speed in the water. Speedos are usually made from a lightweight fabric such as Lycra or polyester and come in a variety of colors and styles.