Avenir Metro III Panniers, Black Pannier system with two main compartments, one large top pocket, and two side pouches with total 2165 cubic inch capacity Dual outside pouches are ideal for securely storing items such as keys and cameras Strong, 420 denier nylon construction; ripstop construction on outside pouches Over-the-rack style mounting with auxiliary elastic straps for a secure fit Lightweight aluminum frame folds flat when not in use