This Trek Interchange Trunk Bag is the perfect accessory for any cycling adventure. It features a sleek black design and is suitable for the rear position of your bicycle. The bag is medium-sized and comes with a zip closure, making it easy to access your belongings on the go. The bag also includes several features such as reflective bands, softshell, shoulder strap, expandable design, collapsible feature, and carry handle. It has one pocket and is suitable for carrying all your essential items while cycling.