Multi-purpose waterproof storage bag.The bag comes with an adjustable strap, which can be fixed on the rear frame for use as a car bag, or can be used as a normal bag through a handle or a shoulder strap, any way you like. Large Capacity Bike Bag: The internal multi-functional design, easy to arrange a reasonable space, fixed items, to prevent the collision of objects caused by damage. You can store your wallet, cell phone, keys, headlights, taillights, car locks, towels, maintenance tools, snacks, etc, especially for the big stuff.