For purifying the most questionable waters in nature, nothing is safer or easier to use than the Guardian purifier. Originally designed for the military, its cutting-edge technology is now accessible to globetrotters and hikers. It will also find its place in a survival kit. Quick and easy to use, this purifier offers enhanced protection against viruses; essential when traveling in developing countries or hiking in busy areas. Its advanced technology hollow fiber filter offers the most reliable way to purify the most questionable waters. With a long lifespan and revolutionary ease of cleaning, this purifier might just be the only water treatment device you'll ever need.