MeanHoo Bicycle Bike Trunk Bag With Mutifunction Pannier Seat Expandable Cycling Travel Bag - Blue Material: Polyster. Color: black. Function: Rainproofis. Package Include : 1x PCS Bicycle Bag. Stylish appearance with texture style sides, durable and functional, also function as a shoulder bag or handbag - Velcro straps for stability and easy installation; fits on all bikes with rear seat Multifunction - It can also be used as a regular bag after parking the bike. One can carry it by hand or shoulder due to its multiple functionalities. Handy drink pocket in back,Fits easily on the back rack, and easily removed. Features: Comes with installations kits. Velcro straps for stability and easy installation, fits on all bikes with rear seat. Sliver grey reflective stripe, it is safe to ride at night. The top of bag has the mesh pocket for store the water bottle or removable shoulder strap. High Capacity - The main compartment offers storage space for books, small laptops, cycling gear or tools, with reinforced and padded sides for shock protection. Side and rear pockets, zippered pouch, and external bungee cords offer additional storage for small items.