Stay hydrated on all your adventures by carrying the Stansport hydration backpack. It holds up to 2 liters of liquid with a patented bite valve that lets you take a sip whenever you need to. This travel backpack has a lightweight and ergonomic design with a mesh back for ventilation and comfort. The straps can be adjusted for the perfect fit. This hydration pack also has a convenient zippered cargo pocket to hold your essentials. The sturdy Dacron material can stand up to all your extreme adventures. Available in black and gray.