Topeak MTX Trunk Bag DXP Description: The Topeak MTX Trunk Bag DXP provides a flexible carrying solution for whatever gear you need. With expandable pannier pockets, the DXP Trunk Bag can hold up to 19.4 liters or be zipped up for times where less carrying capacity is needed. With Topeak's re-designed MTX QuickTrack 2.0 mounting system, the bag attaches quickly and securely to compatible MTX QuickTrack 2.0 compatible racks. Features: Extra-large capacity trunk bag with divided main compartment, multi-stage expanding top Panels on both sides expand out into panniers Insulating rigid molded EVA foam side panels QuickTrack 2.0 click 'n go compatible (see compatibility tab for list of compatible racks) 600 denier nylon fabric for rigidity and water repellency Includes carrying handle, shoulder strap, 3M reflective strip, tail light clip, bungees, water bottle holder Specifications: Pack Type: Trunk Bag w/ Expandable Panniers Pack Capacity: 19.4L (Expanded) Mount: MTX QuickTrack 2.0 Mount Waterproof: Water-Resistant Material: 600D Polyester Dimensions: 14.1 x 9.8 x 8.5-11.4" Color: Black Weight: 1185g Looking for a trunk bag that is compatible with other racks? Checkout the strap mounted version.