Material: TPU Capacity: 3 liters Color: green Size: 52.5 cm x 19 cm Usage: outdoor sports, mountaineering, climbing, hiking Water temperature : -20 C to 50 C. Package Contents: 1 x 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 bottle washing brush is also very large, so 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 ice maker directly in the fridge. The smoothness of the inner tank prevents bacteria from sticking Provide a better moisturizing effect - this 2 liter water tank can withstand temperatures from -20 to 50 degrees Celsius. The insulated tube withstands temperature changes in hot and cold weather. Ensure healthy mobility, be easy to drink and stay hydrated while you bike, bike, hike or run Leak proof - our high-flow bite valve won't slow you down. Simply bite the nozzle to absorb moisture. A soft nozzle with an easy-to-use ON or OFF valve prevents leaks. It also has a dust cover. Conveniently control the flow of water by biting. If you don't bite, water won't come out. The quick release tube is detachable. After removing the hose, it closes automatically, the airbag is still full and leaking