MSR Sweetwater Microfilter

Treading the middle ground between our lightest and most durable filters, the SweetWater Microfilter makes water treatment easy. Simple, lightweight and versatile, it’s the perfect water treatment option for light to moderate use, with the capacity to easily step-up to the demands of the occasional big trip. It pumps easily with a 4:1 mechanical advantage, producing 1L per minute and can easily be cleaned in the field without tools to restore flow rates. Package includes: SweetWater microfilter, 80-micron stainless-steel prefilter, (2) color-coded silicone hoses, foam float, water bottle adapter, cleaning brush, and stuff sack.

*Testing: Testing: Meets NSF protocol P231 for removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water.


  • Fresh Tasting Water: Activated carbon core helps eliminate taste and odors.
  • Easy to Use: Unique lever-action pump handle has a 4-to-1 mechanical advantage,
  • Lightweight: Weighing just 11 oz., it's one of the lightest filters on the market.
  • Compact: Handle folds flat when not in use for easy packing and storage.
  • Water Bottle Adaptor: Comes with a screw-on wide mouth water bottle attachment so it easily screws onto any wide mouth water bottle.


Weight (Standard): 11oz
Weight (Metric): 0.32 kg
Width (Standard): 2 in
Width (Metric): 5 cm
Length (Standard): 7.5 in
Length (Metric): 19 cm
Effective against bacteria: Yes
Effective Against Chemicals/toxins: Yes
Effective Against Particulate: Yes
Effective Against Protozoa: Yes
Effective Against Viruses: No
Filter media: Silica Depth
Filter Pore Size (microns): 0.2
Flow (L/min): 1 liters per min
Flow (strokes per liter): 75
Cartridge life: 750 liters
Field Cleanable: Yes
Field Maintainable: No
Water Bottle Adapter: Yes
Cartridge Replacement Indicator: Yes
Mechanical Advantage: Yes
Country of Origin: Made in the U.S.A. of U.S. and Imported Materials

Ideal For:

Hiking, Backpacking, Camping, Portability, Fast Pumping

Staff Pick:

"I've had this water filter for about 15 years and it is still going strong and in great working condition - I go camping a couple times each season. I fill up my families water bottles in no time. The filter is also easy to clean and I've never had to do any repairs on it. Best filter I've ever used." - Blair