Lightweight, breathable and comfortable fit, this water backpack is a great design for outdoor camping, running, cycling, mountaineering, walking and marathon.<br/>Features:<br />Roomy with enough pockets for convenient to hold 2L hydration bladder, phone, keys, cards, thin raincoat and 500ml soft water bottle.<br />Ultra light pack with breathable shoulder strap distribute weight effectively.<br />Water repellent nylon material with ergonomic design, lightweight and comfortable fit on your back.<br />Water tube fixed loops ensures the tube in place during sports.<br />Quick release buckle in front for easy wear on and take off.<br />Reflective stripe improve visibility and safety in dark cycling and running.<br />A cup cover, emergency whistle and emergency blanket for free.<br />Keep you company during outdoor running, cycling, mountaineering, walking and Marathon.<br/>Specifications:<br />Brand: AONIJIE<br />Material: 210D Nylon<br />Capacity: 5L(all pockets)<br />Color: Red / Green (optional)<br />Model: S-M / M-L / L-XL (optional)<br />Size: 39 * 38cm / 15.4 * 15.0in<br />Weight: 200g / 7.1oz<br />Package weight: 210g / 7.4oz<br />Package size:  39 * 36 * 3cm / 15.4 * 14.2 * 1.2in<br /> <br />Package list:<br />1 * Backpack