Letter Re: Winter Survival
HJL, One point to consider regarding use of water filters in cold weather: Both Sawyer and Lifestraw warn that once their filter have been used, they should not be exposed to freezing temperatures. Ceramic filters are not as susceptible. From the Lifestraw web site: “If your LifeStraw has been used, and is then exposed to freezing temperatures, water inside can freeze and crack the filter. You may not see these cracks, so we recommend never letting it freeze once it’s been used. When camping at high elevations or freezing temperatures, be extra careful not to let it freeze.” From Sawyer …