Attaches to the crossbar on dual sport bikes with side release buckles. Makes exploring and wandering easier and more fun. In addition to the huge fold-out map display window there are a bunch of other pockets and zippered compartments to hold a note pad, writing tools, compass, etc. The world’s best way to carry maps on a bicycle or dirt bike. Black. 9"×5" outside window size. 13"×20" inside window size.