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  • Backpacker April '08: ''The HyperFlow is so fast and light it converted several editors who had sworn off filters in favor of chemical treatment.''
  • Hollow fiber technology offers an extremely high flow rate of 2.75 liters per minute
  • At just 7.8 oz., the HyperFlow is the lightest, most compact pump filter created by MSR
  • Filter physically removes particles, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, cryptosporidia and others
  • Pump is fully field maintainable and does not require tools for complete disassembly
  • Included Quick-Connect™ bottle cap interfaces with MSR hydration products, Nalgene bottles and other containers with 63mm threaded openings
  • Quick-Connect™ cap allows the pump to attach directly to the bottle or hydration bladder for the most convenient filling
  • Included prefilter attaches to the end of the intake hose and blocks larger contaminants from entering the microfilter
  • Prefilter floats near the surface of the water to avoid intake of contaminants located at the floor of your water source
  • Over-molded end caps on the pump provide an excellent grip and pumping comfort
  • Adapt the HyperFlow pump into a pump-free gravity filter with the HyperFlow Gravity kit, sold separately

Made in USA.

MSR has identified and fixed a flow rate issue affecting some cartridges in MSR HyperFlow microfilters. As of February 11, 2009, all filter cartridges sold by REI perform to flow specifications.

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Members, earn a $20 bonus card when you spend $100 or more Jan. 13–23

Single-use bonus card redeemable Jan. 27–Feb. 6, 2017. Details

View all MSR Pump Water Filters

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Best Use Backpacking
Filter Type Pump
Filter Medium Hollow fibers
Removes/Destroys Protozoa and Bacteria
Pump Force Unavailable
Pump Strokes Per Liter 20
Output 3 liters per minute
Housing Material ABS plastic
BPA Free Yes
Field Cleanable Yes
Dimensions 7 x 3.5 inches
Weight 7.8 ounces