Product description: Material: TPU Capacity: 3 liters Color green Size: 52.5cm * 19cm Usage: outdoor sports, mountaineering, climbing, hikingWater temperature: -20 C to 50 C. Scope of delivery: 1 * water bag Large opening, easy to clean and fill - our water bladder has one of the largest openings on the market. The large opening makes it easy to fill with water. The width of the hand washing brush or the bottle washing brush is also very large, so that it is easy to enter the inner hydration bladder. The nut is easy to tighten and unscrew. When the water is cold, just put the ice cubes in the spoon or put the ice maker directly in the refrigerator. The smoothness of the inner tank prevents bacteria from adhering Provide better moisture effectiveness - this 3 liter water tank can withstand temperatures from -20 to 50 degrees Celsius. The insulated pipe withstands temperature changes in hot and cold weather. Maintain healthy mobility, are easy to drink, and stay hydrated while biking, biking, hiking, or running Leakproof - our high-flow bite valve won't slow you down. Just bite the nozzle to absorb moisture. A soft nozzle with an easy-to-use ON / OFF valve prevents leaks. It also has a dust cover. Control the flow of water with the convenience of biting. If you don't bite, no water will leak out. The quick release tube is removable. After removing the hose, it closes automatically, the airbag is still full and leaking