The Guardian Purifier by MSR is the world's most advanced backcountry purifier for the explorers who refuse to compromise on water safety!

Originally engineered for military squads and now trusted by global adventurers, this pump purifier delivers ultimate protection against viruses, bacteria, protozoa, and sediment from even the most questionable water sources. Meeting NSF protocol P248 – the same testing standard used by the U.S. military – the Guardian tackles "worst-case" water conditions with confidence. Pumping a rapid 2.5 litres per minute, it offers added viral protection without the hassle of chemicals, bulbs, batteries, or waiting around. Its revolutionary self-cleaning technology means the pump maintains consistently fast flow rates with zero maintenance – no backflushing or filter-scrubbing ever required. From developing nations to popular wilderness areas, this leading-edge hollow fibre cartridge treats up to 10,000+ litres while withstanding heavy use, freezing, drops, and harsh environments.

The MSR Guardian Purifier – because when you're off the beaten track, only military-grade protection will do!

• Meets NSF protocol P248 testing standard used by U.S. military
• Removes viruses, bacteria, protozoa, and sediment from worst-case water conditions
• Pumps a rapid 2.5 litres per minute for fast hydration
• Self-cleaning pump technology maintains consistent flow rates
• No backflushing or filter-scrubbing ever required
• Leading-edge hollow fibre cartridge treats up to 10,000+ litres
• Engineered to withstand heavy use, freezing, and drops
• No chemicals, bulbs, batteries, or waiting required
• Originally designed for military squads and global travellers
• Advanced hollow fibre filter purifies even filthy water conditions