Dappo is a long vest/waistcoat with a long slit on the back. It used to be worn over Chang-ui or Cheollik, or uner Dallryung in the late Joseon period. The outer laer is a lotus-petterend silk and the lining is a silk tabby. The collars are narrow, blade-shaped and the breast ties are also in a long, narrow shape to match.
You are all set!
Your first Culture Weekly will arrive this week.