Boxershorts are a type of men's underwear that are loose-fitting and have a longer leg than traditional briefs. Synonyms for boxershorts include boxers, boxer briefs, trunks, and shorts. Boxers are a popular alternative to tighter-fitting briefs, and are made from a variety of materials including cotton, nylon, and spandex. Boxer briefs, on the other hand, are a hybrid of boxers and briefs, providing a tighter fit and a longer leg. Trunks are similar to boxer briefs, but have a shorter leg and are often more form-fitting. Shorts are a looser, more casual option that are often worn as outerwear in warm weather.