Large capacity MTX trunkbag constructed using TopeakÆs new process that combines rigid EVA foam panels w/ 420D nylon for greater rigidity and water repellency. Compatible w/ all Topeak MTX Quick-Track rack systems. Features: divided main compartment ; two side panels w/ expandable panniers; shoulder strap, 3M reflective stripe. MTX Pannier Side Frame required for use w/ MTX Beam racks