LIGHTWEIGHT & BREATHABLE: This 15L capacity hydration backpack only 1.1 lb (500 g). The back and shoulder straps are designed with a sponge venting system that creates an air flow when worn. Breathable and durable, for outdoor sports such as Hiking Mountaineering Cycling Camping Skateboarding Running Fitness. COMFORTABLE & SAVE EFFORT: Adjustable Padded S-Strap, Shoulder Chest, Waist Straps, makes the hydration pack’s force scientifically distracted and ensures a comfortable fit. SUFFICIENT SPACE & SAFETY: This hydration pack has 12 different size pockets and 3 suspension systems for Mobile phone Towels Bladder Kettles iPad Snacks Gloves Flashlights Wallets. 8 nighttime reflective strips and 1 life whistle are safer to travel. Water repellent & scratch-proof fabric protect the inside of the pack. FINE DETAILS: Our camelbak use the best materials, the finest workmanship, to ensure that the backpack is not easily damaged.