This backpack is made of high-quality nylon fabric, lightweight and tear-resistant. It can be folded into the bottom pocket for easy storage and carrying, very convenient for cycling, running, camping, traveling, and other outdoor activities. Features: Crafted from ripstop nylon fabric for extreme light weight and durability. Main compartment with a special sleeve for your hydration bladder. Zippered front pocket for small items; Waist pocket keeps your mobile phone at hand. Breathable mesh back and shoulder straps provide ultimate comfort. Reflective elements for added visibility and safety at night. Folds into the zippered bottom pocket to fit anywhere. Comes with a 2L water bladder to keep you hydrated all day long. Perfect backpack for cycling, camping, hiking, traveling, and other outdoor activities. Specifications: Material: Nylon Color: Green / Black / Orange / Yellow (optional) Dimension: Approx. 40 * 20 * 7cm / 15.7 * 7.9 * 2.8in Weight: 265g / 9.3oz Hydration Bladder: Size: 40 * 17cm / 15.7 * 6.7in Hose: Approx. 99cm / 39.0in Weight: Approx. 125g / 4.4oz Package List: 1 * Backpack 1 * Hydration Bladder