Topeak trunk bag rx ex compact design with two side compartments for extra capacity rigid foam insulates and holds shape aero shape for road and fitness bikes fits rx quicktrack system features shoulder strap carry handle 3m reflective strip redlight clip elastic top bungees optional rain cover size l x w x h 31 x 19 x 15cm material 600 denier polyester one main compartment two side zippered compartments capacity 28l bag attachment rx quicktrack system weight 570g buy topeak access