A crossbody bag is a type of handbag that is worn across the body, typically with one strap that goes over your shoulder and another that hangs down in front. The name comes from the fact that you are essentially carrying the bag diagonally across your body, rather than by your side or on your arm. Crossbody bags come in a variety of shapes and sizes, but they all share this basic feature: they allow you to carry a purse while keeping your hands free. They're popular for their convenience and practicality, as well as their ability to keep valuables close at hand.