Men’s track wear comes in enormous styles, to brief the view we have:
Track briefs (also known as racing briefs, Speedos): Track briefs are now often made of a nylon and spandex composite, while some longer lasting suits are made from polyester.
Boardshorts: Boardshorts are a longer version of trunks that come to or past the knee. They usually have a non-elastic waistband, and will give a tight fit around the torso. Boardshorts were originally developed for various "board sports" such as surfing, paddle boarding, Wakeboarding. The looser fitting design provided less material that could catch as one mounted their board.
Trunks: loose, mid-thigh style of trackwear, made of 100% polyester or 100% nylon fabric. They are usually shorter than board shorts but longer than boxer shorts.
Square Cut Track Trunks: A trackwear style similar to track briefs, but with a more conservative cut. They can be compared to boxer briefs but with nylon/spandex composite or polyester fabric.
Jammer: A type of men's trackwear worn primarily by competitive athletes, somewhat resembling cycling shorts or compression shorts.