What is an "opera cloack"?

An opera cloak is a type of long, flowing coat worn over formal attire for formal evening events such as opera performances, balls, and other grand occasions. It is usually made of luxurious material such as velvet, silk, or satin, and can be decorated with embroidery, lace, or other decorative elements. The cloak is designed to drape elegantly over the shoulders and can have a hood, collar, or fur trimming. The opera cloak was popular in the 18th and 19th centuries but is now typically reserved for more formal and traditional events.