Swim briefs (also known as racing briefs, speedos, competition briefs, bathers, racer bathers)
Swimwear in the same style as underwear briefs. Swim briefs are often made of a nylon and spandex composite, while some longer lasting suits are made from polyester. The style varies from a full seat to thong or g-string. Most swim briefs have a beige or white lining on the inside front made of a similar fabric.
Trunks - In the US this describes a loose, mid-thigh style of swimwear, made of 100% polyester or 100% nylon fabric. They are like regular shorts, but features a polyester liner inside the shorts. Although trunks have been used as swimwear since the 1940s, their heyday was in 1990s when they were highly popularized - thanks in part to TV shows like Baywatch. In other cultures (particularly the UK) the term 'trunks' is used to describe swim briefs, although it has been increasingly common for any mens' swimwear to be generically described as 'trunks'.
Related Article: How to Find Swim Trunks That Complement Your Body Type
