See our other RhinoWalk motorcycler luggage systemshere. RhinoWalkMT1418BK Waterproof Motorcycle Pannier Side Bag Set 18L (Pair). Two bags of approx. Total 18L of storage capacity. Excellent Waterproofing : Made of high density 500D PVC tarpaulin material, which is 100% waterproof and very durable and easy to clean.