Features a construction process that combines rigid molded panels with flexible 600 denier fabric for rigidity and water repellency. Large capacity MTX TrunkBag containing one main divided compartment with two expandable pannier side panels and rear water bottle holder. Our unique construction process provides rigidity and water repellency. Compatible with all MTX QuickTrack(R) racks with attached side frames. MTX Dual Side Frames are required when using side panniers on MTX BeamRacks. - Insulated main compartment with molded EVA foam sides, top and bottom - Large capacity main compartment with 2 side panels with expandable panniers - Includes shoulder strap and carrying handle - 3M reflective trim - Elastic top bungees - Compatible with the MTX Quicktrack 2.0 System