Mocase Bike Bicycle Multi-function Frame Top Tube Pannier Bag with Rainproof Cover for Mountain Road Bike 4 in 1 multifuncion bike bag; Bilateral asymmetric design innovation, increase capacity of utility Material: 600D POLYESTER + PVC breathable mesh; Dimension: 7.5"L x 3"W x 6.5"H (one side) With rainproof cover, built-in items are not easy to get wet in the rain Suitable for most kinds of bicycles, such as mountain bike and road bike Both sides of the bag have reflective tapes, which make you more safer when riding at night