What is a keyhole bikini?

A keyhole bikini is a type of swimsuit that features a small opening, or keyhole, in the fabric, typically around the chest or abdomen area. The keyhole can be either a decorative detail or functional, serving as a closure for the swimsuit. Keyhole bikinis are often considered to be more revealing and are popular among those who want to show off their figure. They can be found in a variety of styles, including one-piece swimsuits and two-piece bikinis, and are available in a range of colors, patterns, and materials.