This handy water carrier easily belts around the waist and stays snug while you are in motion. Carrying the water on the small of your back allows for a bigger sized bottle. Roomy pockets make great storage for your keys, cell phone, and other small items. This device is designed for those who can easily reach behind them while jogging; some runners may find it difficult to reach their water. However, being positioned on the back keeps the water from jostling around while you are in motion, unlike some belts that carry water on the hip.