MSR Hyperflow Microfilter - MSR at Moosejaw - Free Shipping

MSR Hyperflow Microfilter  (Fall 2009)   #498791
$99.95

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The Hyperflow Microfilter by MSR is the lightest, smallest and fastest-pumping filter. The best choice for Fast & Light backcountry use.

  • Specifications:
  • Effective against: Protozoa, Bacteria, Particulate
  • Effective against chemicals/toxins: No
  • Weight: 221 g. / 7.8 oz
  • Dimensions: 17.8 x 8.3 cm / 7 x 3.5 in.
  • Filter Matrix: Hollow Fiber
  • Filter Pore Size 0.2 Micron
  • Flow (Liters per minute): 2.75 Liters per minute
  • Flow (Strokes per liter): 30-40
  • Cartridge Life: 1000 Liters
  • Field Cleanable: Yes
  • Field Maintainable: Yes
  • Mechanical advantage: No
  • Water Bottle Adapter: Yes
  • Cartridge replacement indicator: No


  • Features:
  • Field Maintainable: Can be cleaned repeatedly for flow recovery; no tools required for complete disassembly.
  • Super Convenient: Includes our unique Quick-Connect replacement cap that allows the filter to securely interface with any container - MSR hydration products, Nalgene bottles, etc. - 63 mm threaded openings.
  • Mechanical pumping advantage.
  • Water bottle attachment
  • Ultralight: Just 7.4 oz. (209 g).
  • High Flow Rate: Pumps more than 3 liters per minute or one liter every 20 strokes.

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"Be careful - Read the reviews elsewhere" 		          10/05/09
I took this out on a long trip, and at first it worked wonderfully. But it slowed down extremely quickly, to the point that it was a massive workout to pump even 1 liter. I backflushed it regularly per directions (every 8 liters), which is a pain, and I also never dropped it, let it freeze, etc. According to specs, the cartridge should last 1000 liters; I estimate I got no more than 150 liters, with the last 100 a huge ordeal. A friend who was with me at both the beginning & end of the trip was shocked at the difference: he got an altitude headache after taking forever to pump just 2 liters. Read the reviews elsewhere, like at rei.com, & you'll see many similar stories!
    by  Stephanie     from California         Was this review helpful?  Yes / No
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"Light and works flawlessly" 		          09/21/09
This is the lightest and smallest filter I have used so far. Easy to carry and filters water super fast. Love it!
    by  Zhao             Was this review helpful?  Yes / No
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"Lightweight, quick and convenient." 		          08/19/09
This filter is the lightest and fastest filter I have used yet, and I don't intend on ever going back to anything else. It moves a lot of water fast, filters it well, and leaves that fresh mountain stream flavor in lieu of that ethereal iodine taste. It filters straight into a camelbak via the tube and comes with a nifty lid to fit onto your nalgene to keep everything extra special clean. It is also designed to wrap up with itself if you are going ultralight or are otherwise stuffsack phobic. Only negative: in certain situations it is hard to keep the prefilter in the water (strong current, etc) and it wuld be nice if it were a bit more weighted for flowing water type applications.
    by  JOHN     from NEW HOLLAND         Was this review helpful?  Yes / No
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"good compact filter!" 		          07/27/09
Handles the load of any filter out there but takes up half the room!
    by  RICHARD     from AUBURN ACONCAGUA STATUS         Was this review helpful?  Yes / No
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"Light and fast filter" 		          05/04/09
Some people just don't like crunchy water, one of those people is me. When it comes to filters this this is about as light and fast as you can get. The quick-lock fitting is great, no more juggling water bottles. It's also nice not having to carry a scrubby pad for when the filter gets clogged (I'm looking at you Miniworks and Waterworks). The down-side is that there is no carbon element in this filter so don't count on it to filter water near the overflow outlet of a toxic sludge factory. Just read the instructions and pay close attention to the part that says "DO NOT FREEZE". They really really mean it... Trust me. Even if it's completely dry, DO NOT LET IT FREEZE!
    by  Christopher     EVEREST STATUS         Was this review helpful?  Yes / No
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"Great for small volumes, practice cleaning at home" 		          10/01/08
The Good: This filter is great for 1-2 people. It pumps fast and is amazingly lightweight. The Bad: The filter is hard to clean in the field and requires that you still have clean water. The process to clean the filter is complicated and should be practiced a few times at home before taking the filter into the field. Verdict: If you're looking for a lightweight filter and don't mind the maintenance this filter is amazing. If you're looking for something bombproof or for large groups this isn't the filter for you.
    by  CHRIS     from Dayton ACONCAGUA STATUS         Was this review helpful?  Yes / No
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"Will work for those who do not need the carbon" 		          08/04/08
I am actually returning mine. After more research, I noticed it does not have any active carbon to help with the taste. However on the up side it is very light!
    by  PETER     from RIVER FALLS   :   ACONCAGUA STATUS     Verified     Was this review helpful?  Yes / No
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"I would recommend to a friend or my enemy!" 		          08/04/08
Lightweight, easy to use. Instructions are clear and concise. Definitely a keeper!
    by  LYNN     from GREENEVILLE   :       Verified     Was this review helpful?  Yes / No
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"Love it" 		          06/05/08
MSR makes best gears. This won't disappoint you either.
    by  Fang     from BJ   :   EVEREST STATUS     Verified     Was this review helpful?  Yes / No
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"Best water filter period" 		          05/20/08
Okay, I may be jumping the gun because i haven't really field tested it. But I tried it out at home and on a local day hike. It takes a nalgene bottle from empty to full in about 30 seconds and about 8-12 pumps. It incredibly light, also lose more weight by not caring the universal adaptor and fill straight into tube of your bladder system. One down side is the pre filter holds mositure which can get messy when packing up. Plus the bathing suit model in the catalog you sent is a major cutie.
    by  KEVIN     from SYRACUSE   :       Verified     Was this review helpful?  Yes / No
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