The MSR Guardian Purifier is designed to be the safest, easiest way to purify water anywhere on earth. Rugged construction withstands heavy use on the trail or in the field.Strokes per liter: 30-35..Treats up to 10,000+ liters..Rugged construction withstands heavy use, freezing and extreme environments, and is impact resistant..Filter Pore Size: 0.02 micron..Weight: 490g (17.3 oz)..Height: 21 cm (8.2 in)..Max Diameter: 12 cm (4.7 in).Made in USA of US and imported materials..
Co-developed with the military for the most advanced technology.
Great for international travelers, backcountry users or disaster preparedness.
Hollow-fiber media offers the most reliable way to remove pathogens including bacteria, protozoa, sediment – even viruses – from the filthiest water.
Self-cleaning system self-cleans with each stroke, eliminating the need to backflush or filter scrub to maintain flow.
Fast – purifies 2.5 liters per minute from nearly any water source without chemicals, bulbs or batteries.