MSR // Guardian Purifier

(RRP: $625)


The world’s most advanced backcountry purifier.

Nothing is safer or easier to use for purifying the most demanding backcountry water sources than the Guardian purifier. Originally designed for military squads, it brings this highly advanced technology to global travellers, backcountry users, and those stocking emergency kits. Fast and easy to use, this pump purifier offers the added viral protection you need when traveling in developing nations and popular wilderness areas. Its advanced hollow fibre filter offers the most reliable way to purify even filthy water conditions. Add its long-lasting performance and revolutionary self-cleaning ease, and this may be the only treatment device you’ll ever need.


Weight: 490g
Colour: Smoke
Flow: 2.5L/min
Effective against: Protozoa, bacteria, particulate, viruses
Filter pore size: 0.02μm
Ultimate Protection: Meets NSF protocol P248, testing standard used by U.S. military, for removal of viruses, bacteria, protozoa, and sediment from “worst-case” water conditions
Fast & Easy: Pumps a rapid 2.5 litres per minute, offering added viral protection without the need for chemicals, bulbs, batteries, or waiting
Self-Cleaning: Pump self-cleans on every stroke, providing consistently fast flow rates with zero hassle—no backflushing or filter-scrubbing ever required
Long-Lasting: Leading-edge hollow fibre cartridge treats up to 10,000+ litres
Extremely Durable: Engineered to withstand heavy use, freezing, drops*, and harsh environments
• Best in show at the Outdoor Retailer Summer Market trade show in Salt Lake City, 2015
• Gold Winner, Outdoor Industry Award 2015
• Gear of the Year for Fall/Winter 2015 by National Geographic
• Finalist in 2016 UK Telegraph Outdoor Industries Awards
*Withstands MSR water lab drop testing: 1.83m to concrete.
MSR Guardian Purifier

Performing the Integrity Test

Avoiding Cross-Contamination

Enjoy free shipping on all orders over $100. For orders up to $100, a flat fee of $10 is incurred. To learn more about our shipping and delivery, click here.

If you are not satisfied with one of our products at the time you receive it, or if one of our products does not perform to your satisfaction, you may return it to us for replacement, exchange or refund. To find out more about our policy on exchanges and refunds, click here.

Is there something more that you'd like to know about this product, or are you after another product that you can't find here? We are here to help. Contact us now via the form on our site, or alternatively send an email through to