Cannondale Quick Expandable Rack QR Truck Bag, Large, Black Padded main compartment with two generous side pockets that expand to extra large side panniers for max cargo capacity Two generous side zipper pockets Durable 600D nylon construction with water resistant coating, Full wrap reflective band and piping on the side pockets for improved visibility Padded handle extends into shoulder strap Carry More - ready bag will convert into a quick release with optional mounting bracket