The Sawyer water filtration systems use technology adapted from kidney dialysis filters. The Sawyer Hollow Fiber Membrane Filters are composed of tiny “U” shaped micro tubes that allow water to enter into their core through tiny micro pores on the side walls of the tubes. The pores on our filters and purifiers are so small that no bacteria such as E. Coli, cholera, or typhoid can pass through. The 0.1 micron absolute filter and 0.02 micron absolute purifier not only exceed EPA pathogen removal rate standards, these systems will also out perform and outlast most other personal filters on the market.
For a more thorough explanation of our filter technology, check out the Water Filtration section of our Technology Page.
May 19, 2022
In my side pouches, you can find tent poles (right) and a SmartWater bottle (left). A sawyer squeeze is placed inline from the SmartWater bottle and attached to my Osprey mouthpiece to drink fro, as I walk.
The EWG sees picaridin as a reasonably good alternative to DEET—although it hasn’t been tested as long, it doesn’t have the same neurotoxicity concerns. They recommend a concentration of 20 percent for Lyme protection. Common brands include: OFF!, Cutter, Sawyer, Natrapel, Insect Guard.
Fill them up with tap water and it slowly passes through a filter system. Then the main reservoir below collects the filtered water.