Topeak's MTX TrunkBag EXP boasts a large main compartment and expandable side panniers to carry plenty of gear. Plus it's built to last with rigid molded panels mated to 600-denier nylon. And, it's packed with handy features, such as a shoulder strap, carrying handle, taillight clip and top elastic straps. There are even reflective strips for safety. And, Topeak's ingenious MTX System makes it a snap to attach it to your Topeak MTX QuickTrack rack (sold separately).