The big one! A new Strap attachment version of the largest MTX Trunkbag. These are the stiffest, most weather-resistant MTX bags Topeak have produced. Perfect rear rack mount storage bag with side panniers for light mountain touring, road touring, commuting, & errands. Large capacity expandable main compartment with two large side panniers, & a separate top compartment Foam walls provide padding & insulation for use as a cooler or camera bag 600 Denier Polyester Dupont Teflon Coating for superb weather resistance Elastic top bungees Insulated water bottle holder on back of bag Extra thick rigid foam sides, top & bottom Safety light clip 3M reflective strip for safety, builtin carrying handle, plus detachable shoulder strap Safety light clip Compatible with all rear racks. Mounting: Velco straps Capacity: 22.6 litre / 1380ci 36x 25x 21.5/29cm 995g