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  • NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
  • COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • EASY CLAIMS PROCESS: File a claim anytime online at www.Asurion.com/Amazon or by phone. Most claims approved within minutes. We will send you an Amazon e-gift card for the purchase price of your covered product. In some cases, we will replace or repair it.
  • MORE DETAILS: Additional information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase (if you do not see this email, please check your spam folder). Contact us if you cannot locate your plan confirmation and Terms & Conditions via email at AmazonFeedback@Asurion.com.

3 Year Home Improvement Protection Plan

from Asurion, LLC
  • NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
  • COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • EASY CLAIMS PROCESS: File a claim anytime online at www.Asurion.com/Amazon or by phone. Most claims approved within minutes. We will send you an Amazon e-gift card for the purchase price of your covered product. In some cases, we will replace or repair it.
  • MORE DETAILS: Additional information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase (if you do not see this email, please check your spam folder). Contact us if you cannot locate your plan confirmation and Terms & Conditions via email at AmazonFeedback@Asurion.com.
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MSR MiniWorks EX Backcountry Water Purifier System

4.7 out of 5 stars 160 ratings

-6% $112.75
List Price: $119.95
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  • Microfilter water filter pump and 50 purification tablets for hiking, backpacking, camping, travel, survival, and emergency preparedness
  • Replaceable carbon and ceramic filter removes bacteria, protozoa, organic compounds, and particulate; Aquatabs protect against viruses
  • Pumps at a rate of one liter per minute; compatible with a variety of wide mouth water bottles, and hydration bladders (sold separately)
  • Effective against viruses (99.99%), bacteria (99.9999%), and protozoa (99.9%); filter treats up to 2,000 liters of water and each tab treats 2 quarts
  • Pump measures 7.5 x 2.75 inches and weighs 1 pound; storage bag included; manufacturer’s limited lifetime warranty; made in the USA

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From the manufacturer

MiniWorks Header

Mountain Safety Research

MSR has always been a company of engineers, inventors and unruly dreamers. Larry Penberthy started the company in 1969 on a personal crusade against unsafe equipment. Today, we’re still an intrepid team obsessed with creating the most reliable, high-performance gear possible.

Whether it’s defying the status quo in equipment design or radically shifting the social mindset, we believe the greatest innovations—and explorations—are inspired by the world’s unruly dreamers.

Photo By: Scott Rinckenberger

MiniWorks Miniworks Purifier Guardian Trail Shot AutoFlow Guardian Gravity
MiniWorks EX Microfilter MiniWorks EX Purifier Guardian Purifier TrailShot Microfilter AutoFlow XL Gravity Filter Guardian Gravity Purifier
Weight 16 oz 16 oz 17.3 oz 5 oz 12 oz 1 lbs 3 oz
Flow Rate (Liters per Minute) 1 L/Minute 1 L/Minute 2.5 L/Minute 1 L/Minute 1.75 L/Minute 0.5 L/Minute
Cartridge Life (Liters) 2,000 Liters 2,000 Liters 10,000 Liters 2,000 Liters 1,500 Liters 3,000+ Liters
Effective Against Protozoa (ex: Giardia, Cryptosporidium)
Effective Against Bacteria (ex: E. coli, Salmonella, Cholera)
Effective Against Viruses (ex: Hepatitis A, Norwalk, Rotavirus)
Effective Against Particulates (dirt, microplastics)
Effective Against Taste/Odor
Testing Standards P248/P231 NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P248 Testing Standard used by U.S. military for removal of viruses, bacteria (99.9999%), protozoa (99.9%), and sediment from “worst-case” water conditions. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P248 Testing Standard used by U.S. military for removal of viruses, bacteria (99.9999%), protozoa (99.9%), and sediment from “worst-case” water conditions.
Water Bottle Adaptor

Product Description

The MSR MiniWorks EX Microfilter Water Purifier provides proven, reliable water filtration and purification for camping and hiking, backcountry adventures, global travel, survival situations, and emergencies. The replaceable Marathon EX ceramic element removes bacteria (such as E. coli. Shigella, salmonella, cholera), protozoa (such as giardia, cryptosporidium, amoebae), and particulate, and its carbon core eliminates unpleasant tastes and odors caused by organic compounds such as iodine, chlorine, and pesticides. Also included are 50 Aquatabs, which protect against viruses (99.99% effective) when added to filtered water; each tab treats up to two quarts of water. Thanks to its innovative AirSpring Accumulator, the microfilter is capable of pumping one liter of water per minute, a flow rate that is easily maintained in the field, without any tools. The MSR MiniWorks EX Microfilter Water Purifier meets NSF protocol P231 testing standards for removal of bacteria (99.9999%) and protozoa (99.9%), throughout its replaceable filter life of 2,000 liters of water. Compatible with a wide variety of water containers such as Nalgene, Camelback, and MSR Dromedary Bags (sold separately); bottom screws on to threaded lids, or water can be pumped directly into a hydration reservoir drinking tube. Lightweight and compact, the pump measures 7.5 x 2.75 inches and weighs one pound. Includes 50 Aquatabs, and a storage bag. Manufacturer’s limited lifetime warranty. Made in the USA.

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4.7 out of 5 stars
4.7 out of 5
160 global ratings

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