Geosmina frame bags are made of Nylon 600D and Hypalon and have seams, sealed with high frequency welding technology. Nylon 600D is completely waterproof and has an external PU (Polyurethane) coating that repels water and makes the bag dry quickly, when in contact with the air. The bag has a TPU (Thermoplastic Polyurethane) coating that, together with the sealed seams, makes the bag completely watertight. The YKK zippers are waterproof. The interior is reinforced with a padded chassis that gives the bag stability and protects the load from possible knocks. The bag has a double side pocket (one on each side of the bag), each one containing different compartments, including one with a waterproof zipper. Both compartments are lined in yellow 210D Ripstop Nylon with TPU coating. The Gravel-model is meant for Gravel Bikes or for bikes that are meant for the road. It is especially suited for bikes that have frames with little sloping and longer head tubes which means that the top tube and th