When you're responsible for keeping a group hydrated in the field, the filter you reach for matters. Katadyn have been making water filters trusted by military forces and disaster relief organisations for decades; MSR's Guardian Purifier was originally engineered to meet military testing standards. That's the calibre of kit here. The range covers gravity-fed systems from Katadyn, LifeStraw and Platypus that handle basecamp water needs hands-free – hang, fill and let the flow rate do the work – through to high-output pump filters for expedition use where water quality is genuinely uncertain. Some handle bacteria and protozoa; others add a virus membrane for worst-case sources. Replacement filters and accessories are included too, so whatever you're running can be kept going for thousands of litres.
Originally developed to NSF protocol P248, the Guardian removes viruses, bacteria and protozoa from even the most questionable water sources.
Easy-fill, durable, roll-top gravity bag: The easiest way to safeguard yourself and your camping buddies from waterborne risk.
With no need for pumping or fiddly mechanisms you can just fill the water bag straight from the source and let gravity pull water through the filter
Incredibly easy to use with just a gentle squeeze needed to push water through the filter, the flow rate of up to 3 litres a minute means you won't be kept thirsty
