M-Wave have created a useful all-rounder Rack mounted bag with the Amsterdam EXP. The main trunk pack bag can be easily mounted and removed onto the top of most rear carrier racks with its Velcro fasteners. An internal pocket helps to organise smaller items making this an ideal choice for housing quick access valuables and snacks.An unusual feature is that the carrying capacity is expandable up to 16L thanks to two fold-out side pannier type bags