Banjo Brothers Rack Top Pannier Bag: Black. With this expanding design users could turn a trip around town into a shopping spree. Includes a detachable shoulder strap a loop for a safety light and an internal key clip and coin pocket Expandable from 900 to 1300 cubic inches with a drop-down pannier on either side Thick padding insulates snacks and protects gear Fits most rear-mount bike racks Ripstop fabric upper with rugged ballistic bottom panel Offers more visibility with 360 degree reflective accents