Options for this item: Sizes:42 × 30 × 8cm Colour:Red This bag is waterproof and can be used as a bicycle carrying bag, backpack and shoulder bag. It has a great capacity for cycling, traveling, walking, traveling and other outdoor activities that can meet your daily needs. Features: 3 IU 1 design: This can be used as a great bike shelf bag, backpack and shoulder bag for this bag, cycling, going to work, traveling, walking, travel and other outdoor activities. Waterproof: High quality PVC material and welded seams, prevent water leakage into the bag and roll the roller cover, providing better protection to keep your belongings dry. Large Capacity: The main compartment contains a filling mobile for the laptop and a zipper for valuable items; Side File Pocket for Small Items; External zipper pockets for other accessories. Easy Installation: The new assembly system in the zippered pocket makes it easy to install the bag on the back shelf of your bike in seconds. Hidden Hangers: Thick knit shoulder straps provide good breathable and comfort when carrying the bag. The reflective strip in a belt increases visibility and safety at night. Features: Material: PVC Color: Black / Blue / Red (Optional) Size: approximately. 28*17*48 cm/11*7.1*18.9 approximately weight. 1.3kg / 2.9lb Package List: 1 * Backpack