Briefs are made from the same knit material as regular boxers and the main difference is that legs are longer. The legs fit snugly around the thighs. Briefs typically have a lap type fly in front. Boxer shorts are made from woven cloth and fit more loosely around the legs and seat. Briefs usually have a bare elastic waist bearing the brand name. Modern variations are made from microfiber and nylon spandex with pouch fronts and no fly. Some have legs extending to just above the knee. Theses accentuate the manly features of a fit male body.
Boxer shorts typically have an open fly in the front although some have button flies. Boxer shorts traditionally have fabric covered elastic at the waist. Boxers are cool and comfortable but do not provide support.