Using the Women's Dyna 6 Pack is a breeze. First, fill the 1.5 - liter reservoir with water. You can easily carry it on your back and adjust the straps for a comfortable fit. When you're out on the trail, reach for the water tube whenever you need a drink. Make sure to clean the reservoir regularly to keep the water fresh. For storing extra layers and snacks, just open the pack and put them inside. When not in use, store the pack in a dry place. Don't overfill it to avoid putting too much strain on the seams. Enjoy your runs with this great pack!