Description: Made of food-grade TPU plastic, 100% BPA free, tasteless, non-toxic and environmentally friendlyCarry both electrolytes and water to keep you energized. Left and right drink tubes allow access to electrolytes or water on demand. Light suction gives high lubrication, automatic sealing of the high-flow bite valve after each sip, no leakage. Convenient hydration tank for marathon, running, hiking, cycling, climbingLarge hook with sliding zipper closure strengthens the tightness and makes it easy to fill, clean and dry inside the hydration water bagLightweight water bladder is easy to fold and carry, compatible with most hydration backpacks. A great backpack for adults and kids! Specification:Material: TPURoume: 39.9x1 8cm/15.7x7.1inchCapacity: 2LPught Includes:1 Piece Water Bladder