Givi GRT714B Canyon 20L Waterproof Cargo Roll Bag BlackGivi GRT714B Waterproof 20L Cargo Bag Cylindrical, collapsible waterproof storage. The GRT714B from Givi is a 20L dry cargo bag that is fully waterproof thanks to its 840D nylon TPU Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with a variety of properties including resistance to oil, heat and abrasion. For riders, TPU inserts can be found in just about every form of riding apparel out there for an added element of impact