Handle bar pack with roll closure on both sides for quick access to the interior A new camlock is used to secure the strap hook, and the belt for fixing the steering tube is also easier to adjust. The new air release valve with pull string is also added to make the bag compact. And the 15L size bungee cord makes the hook less likely to fall off and more comfortable to use. Available in 2 sizes, the 9L is compatible with drop handles, and the large capacity of 4.