The Platypus GravityWorks Replacement Filter
- GravityWorks water filter system is effective down to .2 microns and meets all EPA and NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa, helping treat water in the backcountry for safe drinking
- Microfilter lifetime of up to 1,500L, depending on the quality of the water
- Does not purify against viruses