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.
A 20% DEET Premium Controlled-Release Lotion will work well against mosquitoes, but Dr. Zimring says he prefers the 20% Picaridin lotion since it also protects against ticks, gnats, chiggers, and flies. (In both instances, he recommends Sawyer brand.)
Part of spending time outside means battling ticks, mosquitoes, and other biting insects. For this, Nelson swears by permethrin.
And out of the products we tested, Dr. Zeichner highly recommends Sawyer Products 20% Picaridin Insect Repellent.