A feather scarf, also known as a BOA, is a type of scarf made from feathers. It is usually worn as a fashion accessory and is often seen in formal occasions. The term 'BOA' comes from the Spanish word for feather, which is 'pluma'. Feather scarves are typically made from ostrich feathers, but can also be made from other types of feathers. They are usually lightweight and come in a variety of colors and styles.