It's not only a bike bag, but also a shoulder / hand bag; 8L large capacity for all your essentials. Features: Quality material provides a waxy, comfortable and slippery feel. 8L large capacity can meet your demands on different occasions. High elastic bungee cord for attaching some wet raincoats or coat. Compact zipper with anti-slip handle strengthens the ability of waterproof. Strong adhesive fastener tape makes bag be secured in place. Reflective logo enhances visibility and safety at night Can also be used as a hand / shoulder bag. Wide Application: can be installed on mountain bikes, folding bikes, road bike. Specifications: Material: 600D. Capacity: 8L Color: Black. Product Size: 37 * 16 * 16 cm / 14.6 * 6.3 * 6.3 in Product Weight: 431 g / 15.2 oz Package List: 1 * Bicycle Rear Seat Bag