Although initially Patch didn't necessarily refer to underwear, 'Patch' today means, mainly in the Kansai region, wool or cotton clothing worn over trunks or briefs and underneath the pants.
当初のぱっちは必ずしも下着ではなかったが、現代では主に関西で、ズボンの下、トランクスやブリーフの上にはく、木綿製または羊毛製のものを指して｢ぱっち｣と言う。