This is the Topeak DXP Trunk Bag.
- 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
- Choose Velcro straps or QuickTrack click 'n go compatible (for use with Topeak MTX racks - see EX Beam, Explorer, Super Tourist racks)
- 420 denier nylon fabric for rigidity and water repellency
- Includes carrying handle, shoulder strap, 3M reflective strip, taillight clip, bungees, water bottle holder
- Size (LxWxH): 14.1x9.8x8.5-11.4'
Volume: 22.6 liters