42 Mm Filter Cap Oyster Simplified design — no zipper

Simplified design — no zipper pocket

Less is more when it comes down to construction

The self-draining

The Big Agnes footprint also enables you to pitch a lightweight

secure fit and easy on/off

42 Mm Filter Cap Oyster Simplified design — no zipperFilter water on the go. The new 42MM Filter Cap threads seamlessly onto all sizes of HydraPak's 42MM thread Seeker water storage bags and Flux flexible bottles morphing them into filtration solutions. The end result being lightweight filtration kits that can either be used to squeeze filtered potable water into other camp bottles and containers or to drink freshly filtered water from a Seeker or Flux. Both deliver fast and easy water treatment around