Wet waxed UV treated cotton canvas. A classic but very strong material will age and show character over time. With functional carry handle. Easy on; easy off in seconds with a magnetic system with reinforced D-ring anchor points and 4 speed-buckles for a secure mount. Comes with a magnetic removable map/accessory screen which sticks to bag; or to the tank directly with padded magnets. The screen is also sold separately and holds a variety of smart phones; small tablets; and even some GPS units through the innovative stretch screen design. Includes two exterior zipper pockets; a generous interior space with interior elastic sides and a pass-thru port for charging accessories.