The Topeak MTX DX Trunk Bag is a medium capacity trunkbag featuring a divided main compartment and two zippered side pockets. Constructed with Topeak's process that combines rigid molded panels with flexible 600 denier fabric for rigidity and water repellency. Integrates with all Topeak MTX QuickTrack system racks for extreme ease of use and stability. There’s no better combination of racks and trunk bags!