Platypus GravityWorks 4.0L Filter System The Platypus GravityWorks 4.0L Filter System utilizes innovative Hollow Fiber technology to offer pump-free water filtration.
Katadyn Hiker Microfilter With its compact size, light weight, and simple-to-use design, the Katadyn Hiker microfilter is an ideal choice for backcountry hiking, camping and backpacking.