MSR Waterworks Ex, Marathon Ex Replacement Cartridges, PES Membrane Cartridges

Added Filtration
Second-stage PES membrane delivers extra filtering power.
Field-maintainable
Can be cleaned repeatedly for full filter recovery; no tools required for complete disassembly.
Fast Flow
AirSpring Accumulator increases filtration speed; up to 1 liter/minute.
Long-lasting
Durable ceramic element ensures protection and will pump water for years.
Effective Protection
Removes bacteria, protozoa (including crypto and giardia), and particulate.
Better-tasting Water
Carbon core removes unpleasant tastes and odors caused by chemicals, such as iodine, chlorine, and pesticides.
Weight: 19 oz./540 g
Dimensions: 8 x 3.75 in./20 x 10 cm
Cartridge Life: Up to 2,000 liters, depending on water conditions
Includes: Stuff sack, hose float, scrub pad, and instructions