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 pocketExpandable from 900 to 1300 cubic inches with a drop-down pannier on either sideThick padding insulates snacks and protects gearFits most rear-mount bike racksRipstop fabric upper with rugged ballistic bottom panelOffers more visibility with 360 degree reflective accents