Top Bag is more accessible than a seat bag, as it secures to your handlebars and stem. With 54 cubic inches of carrying space, it has a great top pocket for quick access to your keys, wallet, phone or snacks. It is roughly the size of a medium seat bag at 6-inches long, 5-inches wide and 2.5-inches tall. This bag has a rigid padded bottom and has ballistic fabric on the high-wear areas. It also sports 360 degrees of reflective accents to help keep you safe and seen while driving.