Topeak trunk bag dxpthe trunk bag dxp from topeak combines moulded side panels with flexible 600 denier fabric to form a semi rigid weather resistant trunk bag the divided main compartment features a two stage expanding top plus side panels that zip open into full panniers for even more capacity features material600 denier polyester divided main compartment with multi stage expandable top insulation moulded eva foam bag attachment hook and loop fastener water bottle holder shoulder strap ca