For comfortable hydration that keeps your hands free, the Nathan Trail Mix 4 hydration belt keeps four easy-squeeze 10 oz./300ml flasks at your side. One-handed flask access makes reaching your hydration easier and quicker. A Swivi buckle on the fully adjustable waistbelt offers a comfortable, true fit. A lightweight, mono-filament 20% stretch belt offers a bounce-free ride. An External Power Stretch mesh pocket and zippered pocket keep personal items organized and secure. Two shock cords with open-pull tension lock for jacket and gloves.