Boxer briefs have become a very popular style over the last 20 years, although they are quite young compared to the traditional boxer shorts from which they're derived. Boxer shorts originated in 1925 by the maker of Everlast. The traditional design was developed for boxers to wear during fights. Later, designers mated the concept of briefs with that of boxers and the boxer brief was born. While they existed in the 1980s, it wasn't until the 1990s until their popularity accelerated and multiple designers began manufacturing them.