One-dollar bills are a form of currency used in the United States. They are green in color and feature a portrait of George Washington, the first President of the United States, on the front. The back of the bill displays the Great Seal of the United States, which includes an eagle and a shield. The one-dollar bill is the lowest denomination of U.S. paper currency still in circulation. It is made of a blend of cotton and linen, giving it a distinct texture. One-dollar bills are commonly used for everyday transactions and are easily recognizable due to their simple design.