MSR Guardian Purifier

Filter Type Pump
Filter Medium Advanced hollow fibers
Removes/Destroys Protozoa, Bacteria, and Viruses
Pump Force 4 pounds
Pump Strokes Per Liter 35
Output 2.5 liters per minute
Housing Material Polyurethane
BPA Free Yes
Field Cleanable Yes
Dimensions 8.2 x 4.7 x 3.5 inches
Weight 1 lb. 1.3 oz.

Unlike conventional hollow-fiber technology, the advanced medical-grade fibers in the Guardian block viruses—something most other hollow-fiber filters cannot do
Physically removes viruses, bacteria, protozoa and particulate, including hepatitis A, E. coli, giardia, cryptosporidium and more
Purifies 2.5 liters per min.
With every stroke, the purifier uses 10% of its water to flush the contaminants in its filter back into the source; this means you’ll never have to hassle with back-flushing
Rugged construction is designed to withstand freezing and drops up to 6 ft.

Made in USA.