<human>:  What is the difference between a crossbody bag and a shoulder bag?
<bot>: The main difference between a crossbody bag and a shoulder bag is how they are carried. A crossbody bag has a single strap that is usually long enough to wear across the body, allowing the bag to stay securely on the wearer. A shoulder bag typically has two straps, one for each shoulder, allowing the bag to hang somewhat loosely from the body.