The altura vortex waterproof top tube bag designed to adjust to different frame configurations and easy to get on and off this fully waterproof altura vortex waterproof top tube is the ideal way to carry smaller quick access gear or fuel on the frame when bike packing or commuting positioned toward the front stem or the seatpost the getblocktrade waterproof zip provides protection against the elements keeping essentials dry altura vortex waterproof top tube bag features altura sh