MSR Guardian Purifier System

Drinking straight from crystalline mountain streams is nice in principle, but a lot less awesome when we end up running for the bushes every five minutes for the rest of the trip. There are plenty of ways to prevent waterborne bummers, but none that we find as effective, easy to use, and reliable as the MSR Guardian Purifier System.

SPECS: Weight: 1 lb. 1 oz. Dimensions: 8.25 in. L x 3 in. W x 4.5 in. H Flow Rate: 2.5L/min Filter: 0.02-micron Advanced hollow fiber DESIGN & DETAILS: Designed to filter water in the most remote of environments, perfect for backcountry users and global travelers Filter effectively removes protozoa, bacteria, viruses, and particulate from filthy wa... moreter Filter cartridge lasts up to 10,000+ liters and has a replacement indicator on it Filter self-cleans with every stroke for fast flow rates and no-hassle use Engineered for harsh environments, freezing temps, drops, and heavy use Meets: NSF protocol P248 for “worst case” water conditions