Underpants are underwear worn on the lower body generally extending no higher than the navel.
Classic briefs have an elasticated waistband at or near the wearer's waist, and leg bands that end at or near the groin.
Diapers (North America) or nappies (Britain, Ireland, and Australia) are a type of underwear worn by young children and those suffering from incontinence.
Unlike other briefs, diapers allow the wearer to urinate or defecate without soiling their surroundings.
There are a number of different styles including bikinis, boyshorts, briefs, cheekies, g-strings, hipsters, and thongs.