Hydration pack

A hydration pack is a backpack with a built-in water reservoir and a hose for hands-free drinking, crucial for long-distance runners. It allows runners to maintain optimal hydration without stopping, which is vital for performance and safety. Hydration packs vary in size, typically holding 1-3 liters of water, and often include storage for nutrition and gear. They are especially useful in trail running or marathons where water stations are sparse. Proper hydration prevents fatigue, cramps, and heat-related illnesses, making hydration packs an essential tool for endurance athletes.