A hollow-fiber filter handles the backcountry streams of North America beautifully, but point it at a questionable tap in a developing country, or a stagnant pond after a flood, and it meets its limit: viruses. The Grayl GeoPress is built for exactly those consequential situations. Fill it, press it like a French press, and drink…

The ultralight collapsible that scoops shallow water and threads onto a Sawyer filter for hands-free gravity filtering. Our field review of the CNOC Vecto.