Royal Blue color. This hiking backpack with 3L food-grade water bladder, providing enough drinking water for a whole day of travel. The connection of the insulated water pipe adopts an upgraded self-lock design, and the large size opening makes it easier to clean. The separate built-in insulation layer keeps the water cool for 4-6 hours Waterproof wear-resistant & Ergonomics: This hydration backpack is made of high-Density nylon waterproof material, more wear-resistant and durable. The soft shoulder strap and the mesh on the back are ventilated and supportive. Adjustable waist strap, more comfortable fit on the back, The ergonomic design makes it suitable for long-term wear Light weight & Large capacity: This waterproof backpack weighs only 1.81 pounds in lightweight design. With a 25L capacity and three storage compartments, plus two side waist pockets and stretchy mesh pockets
