Topeak's MTX TrunkBag EX is perfect for commuting and running errands on your bike. This great bag is constructed of 420 denier nylon with rigid molded panels and features a padded shoulder strap and carry handle for maximum convenience. And, Topeak's ingenious MTX System makes it a snap to attach it to your Topeak MTX QuickTrack rack (sold separately). Added features include a reflective stripe, a clip for a rear light and bungee cords on top.