Revelate Designs Mag-Tank Top Tube Bag BlueInstead of a zippered opening, access to the bag is by a smartly contoured top flap held in place by a magnetic buckle with mechanical engagement Integrated TPU liner for easy cleaning kept in place by velcro so can be easily removed if needed Single handed access with effortless magnetic closure Wrap around panel is padded with EVA closed cell foam Side panels stiffened with HDPE plastic sheets Interior lined with yellow fabric for greater visibility