Need a whole lot of room for gear? Axiom's Paddywaggon EXP 19 Trunk Bag has a dizzying amount space for all your gear and plenty of pockets to keep you organized. It's crafted from water resistant 600-denier polyester and features an insulated and expandable main compartment, side drop-down pannier pockets, and a water-resistant rear pocket. And if that's not enough, it also has a top load bungee system, a mesh lid pocket and external mini-pump attachment straps. It fits on most rear racks (sold separately) and attaches with a simple hook-and-loop strap system, and includes a rain cover, carry handle and shoulder strap.