Platypus GravityWorks Replacement Filter Runderwear absorbing the sweat and oils

absorbing the sweat and oils that would otherwise go directly into your bag and decrease its loft

Robust material with rubber housing to withstand tough treatment and conditions

Plunging temperatures don’t need to bring trail running to a halt

Set-in sleeves for comfort in warmer weather

Platypus GravityWorks Replacement Filter Runderwear absorbing the sweat and oilsThis replacement filter for the 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. Replaces old GravityWorks microfilters.