Ultrapress Purifier Cartridge Pumice - Dyno White X-Dye At a fraction of the

At a fraction of the weight (less than 3 oz) and packed size

Also fits under the seat of the F10 and Frontier 12

built-in whistle and internal name tag

these are just the thing

BEST SELLER

Ultrapress Purifier Cartridge Pumice - Dyno White X-Dye At a fraction of theReplacement purifier cartridges for the UltraPress are designed to last 300 cycles (40 gal. 150L). Lifespan will decline when purifying water with high levels of silt, sediment or tannins. Cartridge press time increases towards the end of the cartridge lifespan; when press time reaches 25 30 seconds, the cartridge should be replaced. Cartridge continues to protect, even as press time increases.