This backpack is made with reflective fabric to increase visibility and safety at night. The main pocket has a separate pocket designed for the water bladder to keep you hydrated. The straps are adjustable to keep you comfortable. This backpack is great for cycling, camping, hiking, mountain climbing, running and other outdoor activities. Functions: Made of high quality reflective fabric, clearly visible in low light to keep you safe. Zippered front pocket, two zippered waist pockets, two mesh side pockets keep you organized. The padded mesh back provides maximum breathability and heat dissipation, keeping you cool and comfortable. Adjustable chest/shoulder/waist straps ensure a perfect fit. With a capacity of 8 liters, it is suitable for outdoor activities such as cycling, camping, hiking, mountain climbing, etc. Specifications: Material: reflective fabric Color: Black/Grey (Optional) Size: 21 * 9 * 40 cm / 8,3 * 3,5 * 15,7 inch Weight: 320g / 11,3 oz List of packages: 1 * bicycle backpack