It’s a streamlined trunk for running errands or packing a picnic. The 510-cubic-inch capacity is plenty of space for extra clothes, food, and camera. Use the side pocket for quick access to change, or anything else that might get lost in the huge main compartment.
Attach a safety light to the web loop to supplement the 360 degrees of reflective accents.
This rack-top bag has an even bigger, fatter cousin: the Banjo Brothers Expanding Rack Top Bag.