These days, hydration packs are not only worn by athletes and highly active users, they are worn by many other people too. You will see Security Guards, Ambulance, Police, and the Military wearing them. They are a simple and convenient way to have water on hand, if you are not close to a tap or shop. If your job keeps you on the move or standing in one place for long periods of time, an OZtrail Hydration Pack is easy to have with you all day and all night if necessary. Some models have extra pockets to store extra gear in.