The Sawyer One-Gallon Gravity Water Filtration System provides an essential, hands-free water purification solution for groups in outdoor settings or emergency situations. This compact and portable system harnesses gravity to draw water from its included one-gallon reservoir through an advanced 0.1-micron absolute hollow fiber membrane. The filter is certified to eliminate 99.99999% of bacteria, 99.9999% of protozoa, and 100% of microplastics, with the capacity to treat up to 100,000 gallons of water when properly maintained.

Features & Specs 

• The 1-gallon bladders feature a wide mouth cap for easy filling.
• Hang the bag — from a tree, the back of your pack, or hold it up with your hand and let the gravity filter do the work.
• Includes a dual-threaded MINI water filter, 1-gallon bladder, cleaning plunger, and gravity hose with adapters.
• It also comes with Sawyer's Cleaning Coupling accessory.
• The Sawyer Squeeze Filter can be used in conjunction with a hydration pack.