A Bifold is a small folding case or Wallet used for carrying personal items such as credit cards, cash and identification cards. A Bifold is composed of two panels which usually feature an inner face with compartments and a plain outer face. When the folds are away from each other, the Bifold can be opened on the upper edge to allow the placement of paper money or small documents.
About ID Holders:
ID Holders are small holding cases which are used for carrying personal items such as identification documents, credit cards or currency. ID Holders are generally made of leather or leather-like materials and feature a special see-through ID window for ID cards, card slots and a compartment for paper money.