The Katadyn BeFree Gravity 10L is a high-volume, hands-free water filtration system built for base camps, large groups, and emergency preparedness scenarios where clean water access for 5 to 10 people is essential. Fill the 10-liter collapsible bag from any stream, lake, river, or outdoor source, hang it from a branch, pole, or anchor point, and let gravity do the filtering while you focus on everything else. The 0.1 micron EZ-Clean hollow fiber membrane filters out sediment and fine particles at up to 2 L/min flow rate with up to 1,000L total capacity. At 10L per fill, it handles drinking and cooking water for large groups in a single cycle, and the collapsible bag stores flat when empty for efficient packing. No power, no pumping, no chemical treatments. Setup requires no tools and field cleaning is simple: shake or swish the filter element in water to restore full flow. BPA-free throughout and designed to scale with your needs, the BeFree Gravity 10L is trusted for backcountry base camps, family expeditions, and emergency water supply situations alike. Backed by nearly a century of Katadyn water filtration expertise.