Roswheel 14541 Multifunctional Bike Rear Seat Cargo Bag Bicycle Rack Trunk Panniers MATERIALS: made of 600D polyester and whole bag is padded with PE cottons, solid, durable and good shape MULTIFUNCTION: can be used as a shoulder bag or handbag; elastic straps on the top can fix water bottle, maps or rain cover etc. HIGH CAPCITY: totally 13L (4 gallon) capacity for holding casual essentials, books, tablet, clothes, or cycling tools and accessories, such as phone, wallet, gloves, glasses, mini pump, tire repair kit, spare tubes and so on WELL-STRUCTURED DESIGN: dual U-shaped zippers; main compartment, 2 side pockets, back pocket SAFETY ENHENCED: two side reflective logos, all-around reflective pipeline and back reflective strip with taillight loop