Not only does this system make it easy to filter water, it is also compact and light. The GravityWorks 2.0L system holds up to four liters of water making it ideal for up to 4 people in the backcountry. Easy, Pump-free filtering. Fast! 1.5 liters per minute. Weighs as little as 7.2 oz. (203 g). Ultra-Compact. Back flushes in four seconds, maintaining optimal performance with no additional parts. Proprietary Platy zip opening makes collecting water easy.. Meets all EPA ; NSF guidelines for the removal of Bacteria and Protozoa. Made in U.S.A.

About Eastern Mountain Sports
"The adventurer’s heart is a spellbinding mix of passions – a fire that burns to explore the limits of both nature and self. And to push those passions to the max every single time they take it outside, we at Eastern Mountain Sports know that every adventurer needs to believe in every single thing that’s in their pack – starting with the pack itself." --- Eastern Mountain Sports; More Details