Available in 3 litre and 4 litre sizes the h2pro frame bag is designed to store bulky items within the bike frame without altering the bikes center of gravity or handling characteristics. Constructed with our all new h2tex three layer waterproof fabric and a high quality water and dust proof zipper the h2pro frame bag features a hidden port that allows you discrete access to the bag for charging batteries or connecting to a hydration bag. Features giant exclusive h2tex 3 layer waterproof material hidden port design perfect for charging cables or hydration hoses interior storage pocket helps keep contents organized and in place high quality water dust proof zipper specifications material h2tex three layer waterproof fabric colors black size 46.5 x 6 x 13cm 4l volume 4l