Different styles: briefs are short underwear, Y-shaped, covering only the buttocks and thigh roots. Pants are shorts, about above or below the knee, which can cover the thighs and calves.

Covering parts are different: briefs mainly cover private parts of human body. As underwear, the main purpose of their design is comfort and avoiding exposure. Pants covering thighs and calves can be worn as sports shorts or casual shorts. The main purpose of their design is to show the leg lines and facilitate activities.